I've always considered my hunter as "main" but my titan is always right there, often he is the first to do end-game stuff like Skolas. Sometimes I'll go almost a week or so with Titan getting all the screen time, warlock gets that sometimes too. Still rolling defender in PVP and mostly PVE - have not even finished the solar subclass (forget to swap when turning in bounties or it would have been done a long time ago)