Don't forget, most of the Mass Effect/2 achievements are tied to in game rewards, such as special weapons training where you wouldn't normally get it.
As for myself, I'm a completionist. I like to play through every part of a game, complete every ending, find every item, etc. I only become a ***** when a friend of mine has got a game with easy achievements that I can get in a few hours. I recently did that with Peter Jackson's King Kong: The Official Game of the Movie (yes, that's the title). It turned out to be an alright game, but bat**** easy achievements.
Also, this.
[Edited by yosup, 6/23/2010 11:24:40 PM]