For me I'm still finding a lot of game content to experience and have fun with. Patch 1.2 will add a lot more stuff so I'm excited about that. I'm leveling up a sith inquisitor now and that has opened up a whole new perspective on the game. On my republic toon I'm grping with friends for heroic dailies, FPs and gearing up for OPS (which they are already doing, I'm just slow)
I think everyone will find an MMO that is for them. Some MMO's are better then others and some are just a mild distraction until the next MMO. Folks decide what works for them and what doesn't.
I find that SW:ToR does lend itself to a more solo environment then other games. The option to grp up for quests, fp's and social fun is there if you decide to partake in it. Also, having friends to grp with adds another layer to the game. Again it all depends on what you want out of an mmo and how you pursue that.
For now I'm having a blast and I know my buddies in game are also enjoying themselves as we exchange questing stories, PVP headaches and how we so want to date are companions.
We all are looking forward to all that SW:ToR will implement over the coming months.