A sound I really hate is coins rattling on a hard surface, like when a waiter or shop assistant gives you your change, or when coins are thrown into a cash till. Or when you put them into a slot machine of any kind. (The only exception to this is the sound of cash tills in Pink Floyd's classic track "Money' from the album 'The Dark Side of the Moon' - but that's choreographed.) I also dislike handling cash or banknotes of any kind, as they leaf an acrid smell on your fingers, so parking meters etc are a trial! As a result I pay for everything, even small items worth a few pence, by card. When I got my first bank account as a boy I used to annoy shopkeepers by paying for bars of chocolate by cheque.
Interestingly enough, StreetMedic, I also hate the sound of people chewing - in fact the sight of anyone eating gives me the creeps.