On live, my main was a defender to follow my (now ex) hubbys blaster. She was my main because he always wanted to play that pair.
Now, if I had to declare a main it would be TankYou. If I can't find teams with any of my (now 84) alts, I jump on her and chill in a fire farm. If I see someone advertising awesome content I havent tried yet, I jump on her and join in. She is primarily a farmer but is capable of any game content (that I have tried so far).
I have quite a few 50+ I can switch to to help out a team in whatever capacity they need, but I really enjoy the 1-25 journey the most so altitis reigns supreme 😁