I love battle mode. I'm much better at battling than racing. I prefer balloon battle and renegade round-up. I always found the team aspect fun. I don't participate in tournaments since there's no points on the line. I always play worldwide.
I don’t really use Discord other than for communication purposes. I used to be a member of a Mario Kart forum over a decade ago, but it no longer exists. It was a fun place for meeting people. I know about MKCentral, but the nature of that forum is wayyyyy too competitive for my liking.