Why limit yourself?None. There are already too many.
It's not about limiting yourself, it's about limiting everyone else.Why limit yourself?
Barbarian- Whirling Dervish and one that actually lets you transform like a lycantrhope
Would seem reasonable for whatever book the Mystic finally sees print in.Kalashtar
Githyanki & Githerazi
Thri-Kreen
Oh, and Pixies, I suppose...Satyrs
Centaurs
Janni
...Oh, and Pixies, I suppose...

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.