I can go and max any profession from the AH except LW. I can max skinning in like an hour or two. It's like skinning is always on hold waiting for me to grind out ten thousand leathers for me to catch leather working up to it. Then 20 mobs later.... skinning is on hold again. Kill 50 skinnable mobs... make 2 pairs of pants and repeat.
Engi, chanting, every other proff, you can make stuff useful to you. Not skinning, everything is 30 lvls below you. you can never make anything useful til maxxed out. But then, you run one dungeon and get something better.