Seems to violate RP to me. A werebeast is something that transforms into something else when angry or at certain times, not someone who can choose to change its shape based on the circumstances. That would be a shapeshifter.
Werebeast again
That would be a shapeshifter.
Which is not at all a bad idea for a new qclass if someone up there wants to be uber. 
Which is not at all a bad idea for a new qclass if someone up there wants to be uber.
Qrace... A changeling or something of the sort would be pretty sweet.
I dunno, with all the possibilities, I think you could make a whole class out of being a shapeshifter. It could work.
True..
Though it would be very similar to a monk/blademaster that instead of using stances just changed forms. shrug
Meh, now that you mention it... but I still think it's doable without being more of the same. Just a little bit of creativity and reasonable balance. It's fun to dream anyway. =D