For me it's: (‼️controversial opinion🤷) idk, but writing controversial in case someone gets pissed))
1. Getting mad for listening to "overplayed" songs. Like c'mon, metal is metal💥💥💥
2. Comming up to young metalheads and asking them to name three songs. People need to chill out, and I'm glad the community gets new members :d
3. Thinking they are better than everyone because they listen to bands with 5 Spotify listeners (wrote that one because I met a dude like this and I wish I won't have to repeat this experience ever again)