I’ll start:

• if they keep switching between soldier and mei only, they clearly have trust issues with supports and need the ability to heal themselves without depending on others

• Sombra or Tracer main make me feel like they actively think it’s their job to be the most annoying shit ever, and often succeed in being frustrating

• Doomfist mains I assume are guys who think it’s cool mastering a niche like him

• mercy mains I automatically assume is a woman (even though I used to main mercy and I’m a man)

• zenyatta mains are either just very good with him or are sick of being asked for heals and swap to him as a “you were being annoying say now I really won’t heal you” nice

• Moira are supports who maybe died to enemy DPS and tanks one too many times and decided to take matters into their own hands now

Etc