I've never done any raiding, though I did 10-box for a few months. Back then, leveling was the hardest part as no quests worked in raid groups. I've been getting the itch to do it again in WoD with the quest changes but time is a problem at the moment. I'm busy as hell at work (and loving all but the lack of sleep/gaming) and until that lets up, 5-boxing 3 groups of garrisons is about as much as I can manage.