i work on bittrex and
https://m.poloniex.com and cryptopia . Why these much. Poloniex trade fee is lower then bittrex. Bittrex is more secure in terms of the trust result. I will put poloniex in second.
There is alsl cryptopia.nz i use it cause it helps me to get the arbrirtage information based on the price spread of different exchage houses which really help me a lot.
If i need to hold coins for long time i will prefer to hold it in bittrex thats the thing.
In Bittrex you gonna have the most influential coins like A rated coins like with proper financial back ground which protect the rights of investor.
Like you can find DECENT (DCT) and you can fin DCT in poloniex too.
Cause these are good financial shares/assets.
If you consider about REE Coin the 1000 satoshi valuation feels the 0 dollar valuation of sucker punch which is a scam coin. You cant find it on bittrex or poloniex but you can find it on live coin and in yobit.
Yobit is a red mark exchange house dont trade over there.
Well.reeCoin is out of market now but yeah had talked about the facts that it was traded in Yobit and live coin.
Bittrex and poloniex are not that much manipulate by markets syndication because trade volume is so high fake calls got dumbed or not answered.
But in cryptopia and live coin you can control the market in some way and make some easy gain or make a great loss.