There are criteria I look for when using an exchange.
Currencies usually go on different exchanges, so I have traded on quite a few.
A quality exchange should possess some qualities, including, but not limited to:
-Security: Levels of security varies from centralized to decentralized exchanges. You should be guaranteedbthat your assets are safe, secured and resistant to hacks and malwares.

Large market volume also helps to build the value of tokens on sale as it is exposed to a large market.


-Efficiency: Speed is important in trading, with the volatility in the market, every second is vital.
A good exchange shouldn't be prone to lagging.

Affordable: Transaction fees should be minimized, as low as possible.
But good and quality service, should be get it's penny's worth. It should always be a considerable amount, or free as in a few.

I usually get excited about a new exchange, especially when it has good qualities, and to attract users, it usually offers bonuses and discounts

Centralized or decentralized, as long as it meets my billing, I go with it. I trade mostly on IDEX, hitbtc, binance etc.
I recently trading for the first time on HOTBIT. It was a streamlined transaction. I would recommend it to anyone.
Happy Trading!