Patong – Very touristy, lots of nightlife.
Kata – Beautiful beaches, lots of restaurants and hotels.
Karon – Quieter, great for families and couples.
Kalim – For surfers!
Bang Tao – All inclusive luxury resorts.
Surin – Nice beach, quiet, upper end hotels.
Kamala – Very relaxed area, great for those wanting to avoid crowds.
Mai Khao – Very secluded, several luxury resorts.
Rawai – Opposite end of the island, more local, popular with long term stayers.
Phuket Old Town – Main town centre of Phuket, very local area, not popular with tourists.
Patong – Very touristy, lots of nightlife.
Kata – Beautiful beaches, lots of restaurants and hotels.
Karon – Quieter, great for families and couples.
Kalim – For surfers!
Bang Tao – All inclusive luxury resorts.
Surin – Nice beach, quiet, upper end hotels.
Kamala – Very relaxed area, great for those wanting to avoid crowds.
Mai Khao – Very secluded, several luxury resorts.
Rawai – Opposite end of the island, more local, popular with long term stayers.
Phuket Old Town – Main town centre of Phuket, very local area, not popular with tourists.
Rawai seemed to be what Reddit suggested as well.