Nice article at Geekcrafting and Uberdork abouta World of Warcraft player who supposedly managed to get a level 70 character of every class (and without the lame Refer-A-Friend nonsense Blizzard has been pushing which made leveling trivial for awhile).
Holy cow. I initially leveled a Warlock to 60 back in the day and then stopped playing that character immediately afterward in favor of a rogue which is the only character I (occasionally) play.
I can’t imagine grinding that many toons to that high of a level.