and have been using lots of the exchanges you listed
actually not very good for there to use some exchange ,, you can choose one or two exchanges for your trading ,, because if we use a lot of exchange ,, there is risk to our fund stuck there ,, and if it happened it could be a big loss ,, and that I have ever felt
Advise from a Hero Member, that't is true specially if you have big amount of token. But if you have not so much, I recommend to exchange it once only. Cause many of the exchanges has a fee in every transaction ( add the fee in withdrawing your token from their site ). Be practical sometimes folks.