It's a bit bothersome to have employees constantly approach me and ask if I need any help, which is what the ones at my local BB always ask. It's not a big deal of anything, but I'm just the kind of person that doesn't really like having random people come up to me and offer help when I don't need it. If I want help, I'll ask. If I don't ask, then that means I don't need help. I'm not rude or anything to the employees, though, I just give them my canned response of "No, I'm just looking".
Again, just a small, personal pet peeve on my part.