I'm with you. I tried all of the classes and played four through their starter worlds (wanted to see all four planets fully) and am having a really hard time deciding.
Though I did play JC most of the way through Coruscant and had to force myself to stop. So maybe that's what I'll roll to start.
I also played Esseles through like four times with her and didn't get tired of it. Easily the most fun low-level instance I've ever played. Kinda easy though, but whatever.