Kashyyyk, Tatooine, Korriban, Manaan. (Last two interchangibly)
Kashyyyk is always first, as Jolee is my favorite character in the first one, then Tatooine to do those pesky character missions. The reason why for Korriban to be third, instead of last, is I like bringing Bastila with me. It also is largely depended on whether or not I feel like it.