I have been here over 9 weeks. There are fantastic places to explore - though they aren’t the best for girls. The north is wonderful. I so loved Mae Hong Song, Lampang, Chiang Mai (which is good), Pai. As is the centre and isaan - Ayutthaya, Kanchanaburi, Songhlakaburi, Khao Yai National park, and the wonderful Khmer temples in Isaan are great. I finished this exploration by car with time on Koh Samet, but you could easily end up in Pattaya
If you want perfect beaches but little else try Koh Phayam.
I have to say I hate the girly bars, the loud terrible rock bands in Patong and Pattaya. I have done my punting using the massage places, ThaiFriendly (which is great), Sideline sites and street pickups. In Pattaya now which is a total shithole - Walking Street barely exists. The only usable beaches are on ko lan in the bay. But you can get ST for 800 on Beach Road though they are no beauties. I had a lovely chubby girl all night for 1500, and a another less good girl for 1200 ST both from TF.
Finally the best girls for me are the chatty friendly ones who you can learn lots from and who tell you about their families and Thailand