I think he always hated them; it was just after we'd been together for a few years, he felt safe enough to say, "Fuck it, I hate this shit." Before that, we saw a lot of great late 90s horror together, like Fallen, Event Horizon, Haunted, etc.

The Cabin in the Woods also deconstructs the classic 80s slasher film in a very entertaining way, but as you wrote, Scream got there first.