They're all pretty normal except for Dragon man and the child (the child being exceptionally skilled). The dragon man is crying and excited for you, so he's weird but in a charming way. Larry being the most normal and a normal type trainer.

I think the E4 should be flamboyant and expressive. They should still have their own rooms because it's awesome. I don't care if I'm a student doing this or that; it's one of the most memorable parts where artists can flex.