In the end, never leave coins you don't plan to trade on an exchange. We haven't gotten an exchange hack since Bitfinex, maybe the next one is around the corner.
Yeah you are right, actually I'm not leaving coins in exchanges since they don't give us the private keys.
Liqui, Yobit, Nova and Cryptopia are some good and trusted exchange websites besides the ones you already know about. I trade on them often and the withdrawals also are instant. I've only contact cryptopia support as the admin is on this forum itself and the support is quite responsive.
Thanks, i have heard of them as well, and I can say that they are also nice and good exchanges.