My 2nd Mass Effect Fan art leading up to the release of ME3.
*some ME1 SPOILERS ahead!*
The fate of your Krogen buddy in the orignal Mass Effect was one of the many stand out moments in the game.
While you could easily talk your way out of Wrex getting out of line with a Paragon or Renegade option. Chances are, a player would have enough of this. When I first played, I wanted to see where normal conversation would get me... and after a stalemate Ashley shot him in the back. Thanks Ash.
While this made a powerful impact for that game, I really missed Wrex in the game's sequel. The exclusion of Wrex does not add to anything in ME2, and only changed the context of the events on his homeworld a bit. While the act of him being alive reminds you of the good times you had in the first game.
If I had to go back, I would have left him alive for my main play through, and iced him with for my 2nd character. This goes the same for the choices would could make in ME2 going into ME3 as well.... i doubt having a dead team member is going to make anything in ME3 more interesting. They simply won't be there.
Regardless, I have to applaud Bioware for having the option there in the first place.. and it really did impact me when I realized he was gone forever.
Oh. *ahem. SHEPARD.