Hum, I suppose I dislike the end of Hourai Elixir and Mishaguji, you know, the bullets cross over them and you have to pass at the right time, well, I fail always at things like this, it's logical, but I have no logic.
Same for Silent Selene, it's easy if you stay in front of her at the beginning, but I always stay on the bottom for no apparent reason and I got screwed. I'm shy I think.
The survival of Nue too, I cleared it once, it's only memory there, but it's rare I capture it again, because I don't do the right move.
Well, that's about it. :V