Re-obtained all the achievements for the Mass Effect trilogy, bar the one which requires multiplayer. Mass Effect 2 on Insanity was probably the hardest, especially the early game. Now to complete my ME2 and 3 runs where Kaiden isn't dead.
I think I've only used Kaiden once and that was when I decided to start a non-imporred file on ME2 as FemShep. Have never really kept him alive since I usually play as MaleShep and romance Ashley in the first game. Then I rarely play the first game again since the combat is kinda clunky.