Same here too, I don't think I ever started a playthrough WITHOUT visiting the dunes planet in the first place. For some reason (and/or the mentioned reasons) everyone goes to Tatooine firstly. Korriban fourth because of the extra Revan dialogue options and any threat Terentateks might have offered is now gone for good. Manaan third because nothing on it is a threat to you & the party at this point. Kashyyyk second because Jolee is the best support party member and it's about time someone arrives who can reliably cast Force powers on enemies.
Tatooine first because it's the only place in the game with enemies that respawn (enemies that also drop heaps of experience - the hulak warids) so I stick around the desert and grind two levels once I am done with Tatooine.