I refuse to admit I have real porn hidden in a directory my wife doesn't know about and I refuse to deviate from the story I tell my wife that the hentai on my computer is because it's funny to see an azumanga daioh character screwing an octopus. As such, I have no opinion on this question.
Depends on mood. Sometimes I can't stand hentai and need some real damn boobies. Then other times I like the hentai. I can get bored with one real quick and then just shift over to the other. I like variety. I have friends who say they get sick of porn which is something that isn't likely to be heard from me.