I got Diablo IV last week and played a lot over the weekend. After 40+ hours (thank you, four day weekend), I realized I wasn't enjoying myself, and was just trying desperately to justify the money spent.
I intentionality avoided news about it, hoping to enjoy finding things out for myself. I now very much regret my willful ignorance. I definitely would've passed on the game if I'd known beforehand that it was effectively an MMO. Forced multiplayer, an open world with too many activities, content balanced for groups of players, endless side quests, and cookie-cutter dungeons. But hey, it has horses! And dodging!
My disappointment is immeasurable and my week is ruined.
On the bright side, it reminded me how much I love Diablo 3. I've been playing that the last couple days to get the bad taste out of my mouth.