I wouldn't use yobit as your "first" exchange. Too many weird issues, and very bad support. As mentioned above they don't always keep up with coin changes/forks either.
If you want to go lesser known:
Tradesatoshi - Home has some quiet coins
Novaexchange - Your Crypto Currency Exchange Engine have even more obscure coins (some appear to have been created solely to list there) but right now they can't seem to make up their mind whether they're shutting down for good, or staying open.
www.coinexchange.io is another one that I've used which works well.