I played SWG from the time it launched up until about 4 months ago. I finally realized that there wasn't anything left to accomplish in the game, I had done everything I wanted to do, and there wasn't any new content for high-level characters scheduled for 6-12 months out. I may go back some day, but it'll probably take a tribe of wookies to get me there.
I moved over to Eve Online, unfortunately I haven't had much time to tinker with that lately either, though.