I can do both. I'll play a game with a bad story if I like the gameplay, and I've slogged through bad gameplay because I liked the story. Generally I'd probably rate atmosphere, lore, and story a bit higher though. No matter how good some gameplay is it won't actually be long-term memorable without something backing it up.

But when I do want some mindless grinding there's always plenty of JRPGs around for that, and if I want to stomp around being a badass there's plenty of WRPGs for that.