I'm one of the few people who actually like manga Kaworu. I still think it's strange noone else agrees with me >_> I mean, for once you can actually see why he'd attach himself to Shinji. Other than being some kind of uberwise guardian angel that is actually much too good for Shinji but just has a weak spot for frail human boys-
Not that I didn't like that, I just think the manga version makes so much more sense.

As for DNAngel, it's an awesome series and I love it, but personally I think all the slashiness is fanservice more than meant to be, especially given the note on which it ended... -__-