I am in the same position , Calistoff, in being an altaholic and unable to decide on a main, but sadly never even reach the levels you do because I get crippled with choice and inability to stick to one right from the beginning almost. I'll be very interested to read any informative replies, but don't have anything helpful of my own to offer , other than some understanding, because I don't stick with one role/class in any game to be able to give specific reply. For myself it's because I get bored easily and like the sweet spot of always learning but not having to struggle too hard (age and illness get in the way). Good luck in your quest for a main you can bond with :)