I'm not sure what you'd define as porn - the stuff that is clearly stilted, with unnatural women (huge enhanced breasts and other bits of surgery done to them) and men just there to bang the hell out of them turns me on increasingly less and less.
I'm finding nowadays that natural sex videos (with normal, natural women in them), that more closely resemble sex, turn me on so much more, especially with all the foreplay. I think this is still technically porn, but so much better to watch than all the unnatural stuff.
And I agree that reading erotic stuff is also a turn on, as that allows my imagination to work well.