One thing that kinda turns me off from a lot of online gaming experiences is that I don't like being carried. And I don't mean helped, or playing with better people on a team, I mean getting partnered with someone that can clean a dungeon on their own, or someone that got fully upgraded weapons and armors that can take down most mobs with one hit, or knows all the spawning and kiting locations and just rushes to the end, or wants to give away high level/grade items.
I realize that to some folks getting the best equipment, the biggest grade, or just reaching the end is the goal, but I actually want to play. Climbing up the levels, or killing mobs, or struggling to get pass a mid-boss, or gearing up, those are all things that I actually want to do, so any time I'm queuing up for a dungeon or match and a Lv.500 player joins, I grimace a little bit and hope the next time I'll be matched with people around my experience.