I've never had any problems with the camera in any of the games. I can adapt to it pretty well, so it never really bothers me.
Also, i have to say...God Of War had to have the best camera last gen. It was perfect, and never had a single problem with it.
I do agree with C-Warrior about the top five hardest games though. Shinobi's level 6-A and the last levels are effing ridiculous. The last boss, is effing ridiculous, and playing with Hotsuma's brother makes shit ten times harder. I mean, Akujiki is a pain on it's own, but it drains at a ridiculous rate when you play with his brother (Moritsune, IIRC). You can't just dash past certains enemies and speedrun shit, you have to kill everything in site.
The problem with Nightshade/Kunoichi doesn't really appear until the later difficulty levels. You don't have akujiki there to force you to get souls, but, you need the souls to one hit kill the boss. On anything above normal, you have to 100% kill any level before the boss. No full Chakra gauge means a looooong and hard ass boss fight. That, and the last boss is in****ingsane.