I have several as well:
People on escalators who block others behind them from walking down the "steps." If you want to be lazy and ride down, move aside to the right so that those on the left can walk down as the escalator moves. There's nothing worse than missing your train by 1 minute and having to wait an hour for the next train because a gaggle of self-absorbed phone tappers clogged up the aisle.
Clothing store employees who won't leave you alone while you're shopping. They pounce on you within seconds of you entering the shop and make little comments (ooh, that would like good on you, can I get you a room, let me find you your size, if you buy two you'll get the third item at 50% off, blah, blah) which end up distracting you from the mental list you might be carrying in your head. Plus, it's just annoying to shop while you're being watched.
People who write in CAPS online, in email, on phone text seem to be unaware that caps indicate shouting. I pointed this out to a poster the other day and was hammered with obscenities and crazy off-the-wall comments. He was positively enraged and I had to shake my head at how angry he became but then realized I was at fault for having commented on his conspiracy theory blog post in the first place.