The Trainer Tower's okay, in my opinion, but I don't go there that often.
I sometimes find it as a waste of my time.
My best record is like twenty minutes, yeah, I'm slow. >_>
Trainer Hill's the same, it's okay, but I can usually find better things to do such as the Battle Frontier or contests.
My record on emerald is about the same as the Trainer Tower.
~Aquarelle