While I have some exceptions (theater AUs... there should be more of those), I'm not generally into mundane AUs either. Especially not the retail/service industry ones like coffee shop, flower shop, bakery etc. With other kinds of setting AUs - fantasy, sci-fi, fusions with other canons - I like to read them, but even those aren't generally my favorite as far as writing goes; I'm more likely to just have fun thinking about what the different characters' roles would be but not actually ever get around to writing a whole fic.

I tend to be very interested in the ways a character's background contributes to making them who they are, and while sometimes it can be fun to see how that would translate to an AU setting, a lot of times it doesn't translate well, but just completely ignoring it makes the character a lot less interesting to me. There's also the fact that I have a fair amount of favorite characters with relatively little screen time and ships between characters who don't interact much in canon (or at all... or aren't even from the same canon...) and when you're already making up that much, adding an AU setting on top of that is just too much.

On the other hand, I love canon divergence AUs. Something about figuring out what would change and what wouldn't and what kinds of parallels there could still be if certain things were different just... clicks something in my brain, idk.