The character customization isn't that bad. It has all the same character creation options as WoW, but also has scars, eye color, body size, and complexion. (complexion has styles covering things like dusty face with goggle lines around the eyes, wrinkles, beard stubble, dark side corruption) The only real lacking thing is that there are no races that are distant from human looking. The most non-human race is Twi'leks.
The interface works about as well as WoW's default interface, which I've played with most of my time in WoW. (I've done high end arena and raid content in WoW with mostly default. I was suing mostly default when I got gladiator, and for every raid from Molten Core through Blackwing Descent/Bastion of Twilight.) It's not moddable, which means no gearscore, and no damage meter bragging/whoring.
Yes, Guild Wars 2 looks better in almost every way. But Guild Wars 2 is probably still at least 6 months away (if not longer). I like having an MMO to play, and refuse to go back to WoW again. Star Wars does just enough new things to feel fresh, and I'm hoping it will last me until GW2.