I only used reliable and trusted sites for exchange since my friend was once a victim of scam platform
I use Coinbase,Binance but I also use etherdelta and sometimes forkdelta mate
privacy coins: tradeogre
hidden gems: citex, southxchange
ethereum tokens: Idex
popular coins: Bitmax, Binance
I have tried once Idex but I am not satisfy or mybe Im seeking for more faster since those are the ways I use mostly
Most of the ERC20 coins will be listed in IDEX and due to market condition, their trading volume gradually decreased in the market. Binance and Bitmax are the popular exchanges where we can see a lot of potential coins which has active volumes in the market. So most of the time i used to trade in Both these exchanges.