What attract me to crypto exchange is the high multi security measures on the exchange. I pointed out this because many have lost huge amount coins due to recklessness on the side of developers managing an exchange.I also get attracted to an exchange if the developers of an exchange are total commited to protecting the investors by ensuring listing coins that have real liquidity on the crypto market.
I like an exchange if it has a good outlook with clear trading tools that assist traders in making trading decisions.
I also prefer exchange that has in-house support system.