I've yet to find one I actually enjoyed my time on. I'm better off getting questions answered by just broadcasting in global chat in-game. The dorks and power-moderators of the channels for games are the same types of dweebs who used to lock forum posts asking questions with "lol search function n00b, LOCKED AND BANNED".
I don't understand using Discord besides just matchmaking. There's always 50 chat rooms of various topics going a mile a minute
I'm also super pissed that a podcast forum I used to lurk on for after episode talk shut their message boards down and moved all discussion to Discord.