You have two options:
Mozine / Les Gets – busier, more bars and accommodation, lots of lifts. But harder to get an entry as these are the most popular places. They both were fully booked 20 mins after entrys went online.
Other locations – smaller, but dont get booked up so fast. Still great lifts and good places to stay.
TBH – any of them are great – your in the Alps, you have access to lifts. We stayed in Les Gets and rode in lots of other valleys each day – all connected by lifts. Unless your there just for night life I would not worry where to stay. If you really want night life pick either Morzine or Les Gets – but dont expect too much. Both were pretty quite in the evenings during the PPdS event.