Shadow priest, which I do get is in a pretty crappy place right now, but I'm just not feeling it. My fresh 120 Paladin, I can grab a group of 4-6 and easily mow them down before going on to the next pack with almost full health. With the priest, even with the much higher ilvl, if I try and kill that same 4-6, I'm coming out pretty beat up and having to toss a heal or two on myself before going on.
It's just a crappy system in place that the mobs do more damage and have a higher HP pool for absolutely no reason then Blizzard thinking it extends the game out. I'd rather be able to go do my world quests (which are pretty much chores) and feel like I can do them faster than I could when I was a fresh 120, instead of ticking over some magic number which suddenly makes the mobs stronger for absolutely no reason.