Lelouch would have to be my favorite character, but let's broaden the topic of this thread so it's not another "favorites" thread, shall we? Let's just discuss the show in general, as well as mention favorites. :/
I'm really glad this is being aired on Adult Swim, because the censors help my poor little eyes a lot. ;/ The nudity that's thankfully censored comes up far too often. They simply try to use it as a way to draw in the shifty fans with some useless fanservice. Quite honestly, the show would only be made greater with an absolute lack of this fanservice.
That aside, the show is simply fantastic, though the dragging out of newer, better Knightmares (is it spelled like the actual word nightmare? I'm never sure) seems a little rough. I mean, sure, they're getting smarter and are actually making new ones, but then you have the people with the older models, and it just seems they're giving out new ones just for the cool factor - though it's an effect that works, it's not very interesting when they continue the trend.
I've thankfully stayed away from the Japanese episodes so as not to spoil it for myself, so I can't wait to see the end.