Just finished 2. HUGE SPOILERS ON 2 ARE BELOW
So excited they are making a third. This is a great series.
My random thoughts are below:
1) Mining on 2 was a pain in the ass. Can the stupid mouse move any slower? Also, it would be nice to have a clearer idea of what the resources are going to be used for to determine whether or not it is worth scanning. I had over 200k of 3 of the 4 elements at one point because I was under the impression they would be useful somehow. In the end, I was still too poor to afford one final damage upgrade, but I had 150k of two elements. Kinda silly.
2) Bypassing/Hacking also got old fast. It was actually really fun for the first few times, but after the Nth time, I nearly started skipping things, but I felt forced to do it anyway. Perhaps adding more minigames to the rotation could make this a lot more enjoyable.
3) Story was great, as I expected, although I don't like some of the new characters. And I hate that Ashley Williams was absent almost the entire second game. That was a bit disappointing. Perhaps it was the way I played ME1, but she was such a huge part of my first game that it felt a little empty without her. I remember sending that other marine to die in the first one so I could save her. And later it was bone time. I know the devs can't cater it to how I played through, but I felt sorta cheated by the one dialogue with her, and then she just ran off. She didn't even need to be a squad character, but a little something more.
4) Relationships were pretty good, but could definitely use some work. For example, I only played through once, but it's annoying to have character options limited by your relationship with someone else. I went for Tali (omg hawt), but Miranda wouldn't even talk to me for the second half of the game. She just kept on saying she was busy, even after the mission was over. I assume this was because I was bunking up with Tali, but it was annoying to totally destroy that character. It would be cooler to sort of woo both and force a confrontration. Or maybe let you sleep around provided certain conditions are met. I'm not sure, but it felt very rigid.
There were also a lot of good conversations, but a lot of repeated ones too. Kelly (the lady that checks your email) should definitely have been a deeper character too. Although I did hit that.
5) The ending sequence was a little strange. Two of my squad members died. I did all of their loyalty missions and all were loyal, so I'm assuming it was because I chose the wrong person for the wrong thing. I'm going to replay it to be certain. It seemed really RNG, and almost forces the person to replay it. I know the intent was to not let you see who was going to die, but I didn't particularly enjoy that. I'd rather send Jack to the slaughter for complaining.
6) Compared to one, the side missions were fantastic. They are all unique. While there seemed like less (perhaps substantially so), I didn't particularly mind. The main story itself seemed rather short. I feel like I spent 85% of my time exploring planets/mining/doing sidequests and like 15% on the main storyline. My recollection from ME1 is that it wasn't so lopsided.
7) amg a Bioware game that lets you keep exploring after you finish the game?! WHAAAATTT
So those are my random quabbles/things that I think need to be addressed for 3. While this probably sounds like bitching, I think this is the best game I've played in a long time. Great stuff.
Edit: I just played through the last part again and I managed to keep everyone alive until the last scene, when Jack, the only non-loyal person, died randomly. Kind of annoying. Oh well. She was being a drama queen anyway, and wouldn't talk to me ever since her and Miranda started fighting and I didn't have the Paragon/Renegade score to turn her back. Meh. I don't think it would be possible to not have her die in my savegame.
I'm about to reformat, but I think I'll hold onto my save file so I can load it into 3.