I would always use binance or gdax as well as kucoins. Binance is more of hodling and nothing much. Basically pumping more and more money onto binance each month, Gdax is more of an offshore trading for me, it has a very fast and simple interface with pretty fast updating of the charts as well as prices. As for kucoin, i use it for ICO hunting; basically coins that are just released. Kucoin is known to be very generous when it comes to accepting new coins that has ended there ICO recently. So try these out.