50 people in uniform, 1 person on a register - This is what annoys me most
Constant Christmas music on the loudspeakers - Usually have my headphones on, mostly to discourage employees to ask if I need help, but also the added benefit of not having to hear Christmas music
Fighting the crowds everywhere you go - I've stayed away from actual shopping malls and have done most of my shopping during lunch hours so haven't had to deal with too many crowds
Rude shoppers, rude workers, bad moods everywhere - See above.
Stores sold out of what you want to buy - Haven't experienced this problem yet.