The story with Bitfinex teached all of us that it is too risky to hold all of your coins on one exchanger. Thanks God I wasn't holding my bitcoins there. I use Yobit and Blockchain. I like Yobit the most it is very easy to use and the page is in different languages that is very useful if you are not so good in English.
That is why I just put a small percentage of the coins in the exchange to do the trade. I keep most coins in my own wallet.