I hear you; I really enjoyed the trilogy when I played it on PS2, and God of War 3 was one of the first PS3 games we bought. Even on PSP, I loved the giant gauntlet in Chains of Olympus. Lots of fun...Never played it.
I dunno man, I'm still enjoying the HD versions. Kind of a nice mindless enjoyment/slaughter after 5 months of Skyrim.
But like I said, then I played Bayonetta. I can't entirely explain why, but later when we bought the HD versions and I started the first God of War again, it just didn't feel fun.