I've been using coinbase and cex.io recently. They have too much of a fee in my opinion. Anyone use gdax, or what does everyone use?
I don't do any trading at all when it comes to fiat, so I stick to what I know, that's Poloniex. I've had my Polo account for a while, I never had any problems withdrawing money or depositing it. They don't ask you for any dumb verification process where they ask you for your personal details like on Bittrex.
Poloniex is good for some alt speculation, but the coins get there way too late. I will try getting on Bittrex, unfortunately I don't see any other exchange but Bittrex that has rarer coins with good volume. The rest of exchange have tiny volume.