You would love the hills there bicycling.
Koh Phangan have more to offer than Pattaya. I am kayaking, sup padling, dirt road motorbike, diving, freediving, and Koh Phangan have great restaurants and also great afternoon beach parties which ends early.
Also large parts of Island are quiet in the evening, especially low season. Did I forget anything? Oh, great fishing
The professional lady marked I have no idea how it is, since I mostly mingled with westerns while I lived there as single