First time you should use decentralized exchange It, Forkdelta, Idex etc. After that you can use centralized exchange.
I agree with you. It seems to me that decentralized exchanges are much more reliable than centralized exchanges. I trust the decentralized exchanges more and sell most of the tokens to Forkdelta.
Decentralized exchange more easy but not secure. Centralized exchange always secure if you on two step verification. I don't like decentralized exchange because I need to share my private wallet address where my others token are in the risk.