I know what you mean, but I just have to say . . . hentai is porn!
I enjoy a mix. Sometimes, I want the see animated sex, other times I want real (kind of) sex. I usually turn to hentai when I want stuff that's different, like a cute schoolgirl being raped. Hard to find that sort of thing in live-action videos.
Strangely, my tastes in porn have become more limited as my tastes in hentai have diversified; I don't overwhelmingly utilise one over the other, though, and I have a tonne of largely amateur material. :P