[Iambankai]

For me, that has to be L - the first one that is
Well, when I entered this thread, I gave it a second thought of who I like, and came to the conclusion, that when L died I was so sad, I mean, I did NOT at all expect him to die so early, but thought it might happen at the last episode (in this case, 37).

Spoiler for Episode 37 (just in case...):

But when Light died, I was not that sad, I mean the last part where he goes so much pathetic, I never imagined him like that. Episode 37 changed everything.

Spoiler for Just a anime spoiler I guess... but still ''covering it'' ... in case ;) :

by the way, it's kind of sad that you don't see L's real name (at least not in the anime...)