I've been going to this library for decades now. Granted its definitely smaller than other branches but Clark County Libraries have a decent amount of DVDs and CDs, which is what I usually check out all the time. So I have a bad habit of requesting items from other libraries.
I would probably say the only thing that annoys me is self-check-out and I definitely do wait for my scanned items to turn green however I always seem to set off the alarm anyway. So then I'd have to go back up to the front/info desk and get them rechecked out again. At times that can be a total time waster especially when there is a line.