How about farming the ghosts in Scarlet Monastery graveyard for gold to buy your first mount at level 40.
Or how about the warrior quest for the axe that sent you all over the world to kill things much tougher then you. I didn't get my axe until level 45 and even then had to have help from a level 60 warrior in the guild to finish it.
And one more, the hunter bow from the chest in Molten core that required you to kill 3 demons without assistance (even from your pet) and to finish it had to have the bow string from one of the world dragon kills to change it from a staff into a bow. I still have that in my hunters bank with full T1. Don't think I will ever get rid of it.