Surprising, there are so many DEX I never knew. Out of this massive list, I only use Crypto Bridge and Allbit. Often I try to avoid DEX for its slow loading process, limited listed coins, and small trade volume. I think we need a clean and faster DEX for everyone so it gets more liquidity.
Idex and etherdelta are the most common decentralized exchange I use especially when I want to buy erc20 tokens or when I want to sell it. For regular trading, I still use the centralized one since I mostly trade in btc/fiat pair. Decentralized exchange is good at one side but centralized exchange still better at some points.