What parameters should someone check when trying to choose an exchange to work with?
For me the quick actions are very important in the crypto exchanges and the one which gives it faster is what I choose in first glance. For example, if there is any coin which getting dumped to even pumped then my orders must be opened and closed faster than normal so that I won't loose my money or don't loose my profits. This is important in the situation when you don't have options of auto-trades.
Apart from this I would really hate if my exchanger doesnt load completely in very short period of time. There are some big exchangers which takes a while to load completely and display the real time data. This is not good thing and I will never choose such exchanger at all. Besides this I will also look for my portfolio of the coins and will see which one is listed and which is not. If major of the coins are present then thats preferable for me.