Mostly people where choose binance because there is a huge volume in binance and they said a friendly user exchanger. I do like bittrex to but if you are a newbie you will found it a little deficult in bittrex but still he is a good exchanger.
To be honest, at this point I prefer binance to bittrex. well, somehow I became more accustomed to buying and selling in binends than bittrex. maybe because of its ease, and I can do WD which is quite large quickly.