Binance is one of the top ones that I use too. Bittrex is another old and good one and has the most number of coins available.
Bittrex is a good and big exhange in their era but unfortunatelly bittrex volume exchange are lowed than few year ago.
whales are migrate to binance, and the another exchange with have potential growth in future in Huobi for now, i'm using Binance and Huobi for trading now
Been in bittrex before and don't even open it now, sometimes forget to use it. It's all binance for now and if not listed in Binance then that's the only time I seek other exchange.