Proooobably Itsuki. It took me a really long time to get his character, but now that I have he comes ridiculously easily, I can play him no matter what mood I'm in. It's also nice that he can do really srsbzns plots or he can just bum around messing with people's heads for laughs. He's really layered, too, so he's one of those characters who can just completely surprise me-- I'll suddenly realize something and be like "of COURSE that's what's motivating him", even though it wasn't something I consciously planned on doing. And FFFFFFFF I just like him and want to give him a hug. xD