For what it's worth, you fight a bunch of dragons in Sacred
Oops. When I typed "fighting with" I meant "fighting as"/"fighting via", not "fighting against."
So far, the only games I'm aware that have this:
Drakan: The Ancient's Gates (PS2) - well, I already expressed my thoughts about this
Savage Skies (PS2) - wonderful concept, hideous execution. I shed a tear for what might have been. *sniff*
Dragon Rage (PS2) - I never tried renting it. Fighting against tanks and army men doesn't really appeal to me.
Drakengard (PS2) - played 5 minutes of it before I gave up. Sometimes
in medias res can be effective; in this game, it is not.
Lair (PS3) - well, I don't have a PS3 now, do I? I know, it got crap reviews, but a patch was eventually released that addressed the main complaint.
Neverwinter Nights SoU/HotU: Shifter class can turn
into a dragon at high levels. Not as almighty and foe-crushing as I would have liked.
EDIT:
and some PC game called "I of the Dragon" - anyone know if it is any good?