I've only experienced two/three meds.
Dilantin gave me severe mood swings, excess body hair, gum overgrowth and horrible teeth, and didn't help my myoclonic szs.
Depakote (the regular stuff) I think gives me digestive problems. The ER is a bit better. They both make me gain weight. I just upped my dosage -- looks like it's time for another round of clothes shopping! We'll see if it makes my hair fall out; I guess I'll just shave my head again if it does.