I'd say it depends on what play-style you'd prefer to go for.  Totemist is about getting lots of natural attacks and other special abilities in order to rack up damage in combat and still have something to do outside of it, while Barbarian generally works better as a class that rages, charges into combat, and then makes intelligent use of Power Attack and a few other feats to get high damage.<br/><br/>Overall, I think you'd probably find the Totemist class to be more fun.  You could get things like teleportation, a variety of special attacks, telepathy, or even the ability to turn someone to stone for a single round.  It would all be a simple matter of which soulmelds you chose to shape each day.