I spent a couple of weeks in Phuket last year (patong) and wouldn't go back again.
While there is great LB action in a few bars such as C&D and a terrific LB massage place which had just opened, it gets old very quickly as the choice is very limited compared to Pats.
The other thing that irked me was the rip off taxi drivers, tuk tuks etc. There is no baht bus system, so everytime you want to travel you have to hire a tuk tuk or a taxi and they look for outrageous prices from falangs.
Finally the food, generally crap. Dined out every night and tried many restaurants, way below Pats standard. Maybe I should have gone to Kata or Karon for a different experience.