I've platinumed 60+ games. Not sure how many and I am too lazy to check at the moment. Most of them I have gone back in played long after I platinumed the games but there are a few exceptions.
I really haven't gone back and replayed any of the Resident Evil games. I wasn't much of a fan of the series and only platinumed RE5 and 6 because my friends PS3 bit the dust about the time those games were released. I borrowed and platinumed them just so I could give him hell that I was able to platinum games to his favorite series before he could.
Burnout Paradise, Borderlands, Ratchet and Clank Collection + ACiT, Jak Collection, Sly Collection, Uncharted series...those are the main ones. There's actually a very small number of games that I have platinumed and currently own that I won't ever play again