NOTE: Most of what I write here probably wouldn't be considered a spoiler. The majority of this info you can find within the game (such as powers). The YouTube videos I link to might give away some info, but you don't have to click on them.
I just finished ME2!
The Game: I liked this game a LOT more than the first one. I'm sure it helps that ME2 ran perfectly, whereas ME1 was nothing but problem after problem. That's really weird, isn't it? You'd think ME1, given that it's older, would run smoother than ME2 on my machine (which is now just a little over six years old), but that wasn't the case at all.
My Class: I imported my character from ME1 (who was a Vanguard) and for the sake of role-playing, I kept my class. While I liked Vanguards a lot in ME1, they seemed gimped in ME2. Their special class power, "Biotic Charge," is just about worthless. Oh sure, it can stun the enemy and you can blast through obstacles, but that's about it. The amount of damage you do is negligible at best (when when fully upgraded) and it makes you a sitting duck.
Aside from the disappointment that Biotic Charge was, Shockwave is probably the best power the Vanguard has, with Pull coming in second. Incendiary Ammo is really good, but Cryo Ammo doesn't seem worth it to me.
I took Warp Ammo as my "bonus" power and turned it into "Squad Warp Ammo." That seemed to work well, especially later on in the game. I know Jack could've done that without me taking Warp Ammo myself, but I hate Jack and she's not very good in a fight.
If I were going to play again, I'd probably choose Sentinel. I really like their Tech Armor power, especially since it lasts until it's destroyed, unlike other shielding powers, which have a time limit.
Miranda: She was okay, but had a huge ego and attitude problem. This really shows later on during last mission of the game. Unfortunately, she has some of the best biotic abilities, which means she's important in a lot of situations. One of her powers, Warp, is insanely useful in ME2, whereas it was barely adequate in ME1. Why I didn't get Warp as a Vanguard is beyond me, since that power is incredibly destructive and destruction is what Vanguards are supposed to do best.
Her bonus power, Slam, is very useful. I didn't take it very often, but when I did, it worked really well.
Jacob: Totally useless and lacked personality. I'm sure he's better if you're playing a female character.
I did use his bonus power, Barrier, quite a bit. It was the only power that made Biotic Charge useful at all. Plus, it saved my hide in a few tough spots.
Garrus: Good to have in certain situations and his Armor Piercing Ammo certainly helps. Plus, I like him and I see Garrus and my character as being good friends. Interestingly enough, I was generally more of a "Paragon" Shepard, but when around Garrus, I became for more "Renegade."
I also feel that the mission to acquire Garrus was the toughest in the game. Even the Suicide Mission wasn't as bad.
I didn't bother with AP Ammo, mostly because Incendiary Ammo works well on armor and causes burning and panic.
Tali: My romance character. What can I say about Tali? She's generally upbeat and very nice, which is what attracted me to her. Most of the characters in ME2 (and games in general) are very serious and while Tali was at times too, she was generally just friendlier. I really like the
banter between her and Garrus, particularly on the Citadel.
Tali's also one of those characters who's very weak when you get her, but gets much, much better later in the game. She was my best Tech user.
I didn't use Energy Drain, but looking back, that wouldn't have been a bad bonus power. I hated it when enemies were shielded and blocked my biotics.
Mordin: He's hilarious and unintentionally so, but still quite funny. I really liked his personality and I can't even explain why, but I just did. I also liked the sex advice he gives (which is a little disturbing in its own right) and the
song he sings.
Neural Shock seemed good, but it only works on organic enemies. Once again, I had Incendiary Ammo for that in addition to the armor damage it does. When using Mordin, however, it came in useful (but nowhere near as much as Incinerate).
Grunt: At first I didn't like him; he seemed devoid of character and just a Wrex knockoff. Later on, however, I came to like him and much more so than Wrex. In an odd way, he was funny, especially how he considered Shepard his "battle master."
If I had been a Soldier, Engineer or Infiltrator, I might've used Fortification. Since I wasn't any of those classes and the biotic upgrades I found worked with Barrier, I used that instead when I needed extra protection.
Thane: I tried to care about him, but I didn't. He was very two dimensional. Nice guy, but not much there.
Shredder Ammo? Seriously? Every attack, with the exception of AI Hacking, does damage to organics.
Jack: Hated her. That's about all, really.
Warp Ammo was the reason I even saved her ass. WA was extremely useful in the later stages of the game, especially if you choose the squad-based variety at level four.
Legion: An odd guy (or should I say, machine?), but I liked him. Normally I don't go for the whole "try-to-understand-what-being-human-is-like" sort of thing, but it worked him, especially when at Omega. I grabbed him right before the Suicide Mission, so I never got a chance to bring him along on other quests, such as Tali's loyalty mission. That would've been amusing.
Like Fortification, I would've used this if I had been a more tech-oriented class.
Oh and if you're patient, he also
dances.
Samara: She was very "paladin-like" but fortunately, she wasn't annoying. She was also really calm; sometimes too calm for my liking, but she did have some kick ass powers. Maybe I'm crazy, but it seemed like she hinted at a more-than-friendly relationship at times, but nothing came of it. Not that I would've agreed, but it's still weird that it was just inserted and then dropped.
Reave is an interesting power. The description made it sound absolutely devastating, but in practice, it seemed "okay." Maybe I didn't use it enough or something.
I obviously didn't choose Morinth if Samara was in my party. I didn't like her anyway; she seemed like a real brat to me.
Kasumi: While I thought her mission was really cool, there wasn't much to her after that. Sure, she has some neat gossip, but you couldn't really chat with her on or off the ship after her mission.
I absolutely hated her voice. Maybe it was her speech pattern. Whatever the reason, it's probably good I didn't have to talk to her any more than necessary.
Flashbang? No thanks.
Zaeed: Interesting and far more ruthless than my Shepard on a bad day. I understood his motives and why they were important, but I still had trouble seeing eye-to-eye with him.
Like Kasumi, there wasn't much to say after his mission and his powers weren't too hot.
Inferno grenade? Once again, no thanks.
I don't have the Shadow Broker DLC, so I couldn't take Liara. Just as well, I suppose. She's apparently a temporary party member, so she wouldn't have been any use to him throughout the rest of the game. I wouldn't have used her bonus power, Stasis, at all any way. If I really wanted to hold people in place, I'd use Cryo Ammo; at least that'd be something my teammates could benefit from too.
And finally... here's an something
funny that occurs in the game when gathering resources. To make sure this video was legit, I tried the same thing in the game.
