Anybody who has ever rolled for or joined as xeno is a xeno main. Anybody who doesn't immediately ghost if they get put in a xeno response team is a xeno main. Anybody who plays marine but doesn't do a very good job of it is a xeno main. Anybody who wants the xeno winrate to be higher than the xeno winrate is a marine main. Anybody who is whitelisted for predator is a xeno main. Anybody I don't like is a xeno main.
I normally play whatever side is currently weakest. So recently it's been xenos.
I wanna be a xeno main but not without ID's. I would miss doing CAS as Jasper Rockwell though