Or you could just say
Saruman of many, *cough*, personalities...
If that was said about me, I'd understand it as stubborn, bad-tempered, concieted, inconsistent, lazy, off my rocker, exasporating, over-enthusiastic when it isn't needed, offering help at exactly the wrong moment, and so many more...
But to make things easier, I'm most like Thorin.
Oh, and add
show-off to that list.