I never understood the objections to the $1 coin, especially after the redesign to make it more distinct from a quarter. $1 coins are great for buying stuff out of vending machines since you don't have to fight with a dodgy bill acceptor or a mangled bill.
Further, since I don't have enough pockets to have a dedicated change pocket, it's always getting caught up in my keys and/or pocket knife.
Nobody really gave us training on this stuff, do other countries use a coin purse or some such?
Lastly, they're just comparatively heavy.
I just carry cash around in either a clip or a "front pocket wallet" I think they're called, and it seems more convenient all around.