Hate it with passion. It's just an artificial way to lengthen the game. Make the game have more dialogues or something, instead of making us do things over and over again.
Grinding can be especially annoying when it's based on rng like in some sandbox style games. Wastes time and seems like a way to make the "feel" longer.
I actually like a good grind game, as long as its with a purpose. Like don't me grind out every single thing, but its ok if a game takes a week or so to get through. Just make it within reason.