I also live here now for 5 years. But I live far away from the touristic areas like Pattaya etc. (I'm in the north to the border to Myanmar).
But I also agree with some posters here: if you want girls and party (as cheap as possible): Pattaya, if you want girls and party, but normal prices (still not really expensive): Koh Samui, Phuket, Hua Hin etc., if you're in bangkok and like girls and party: Patpong, Sukhomvit, Nana,
If you want to visit the north: Chiang Mai, Chiang Rai (really nice areas).
If you're not that much behind girls but nice partys (including trance, goa etc.): Koh Phangan. If a relaxed, inexpensive island holiday: Koh Chang
If you like to smoke some nice things make you fly sometimes and also want girls and party give it a chance and check out Cambodia (Phnom Penh and at the seaside Sihanopukville). I also lived there for 1 1/2 years and i have to say, it is by far not developed like Thailand (still a real third world country), but you can do what you want and as the US-Dollar has crashed to the Thai baht (still about 1 year ago 1 USD 39 Baht, now 1 USD 29-30 Baht) maybe Cambodia is cheaper, as "their currency" is mainly the US-$.
If you want to have more infos about Thailand, Laos, Cambodia, Vietnam, just send me a pn with your email address.
By the way: I started online marketing about 3 or 4 years before I moved from Germany to Southeast Asia. And since this time I live here. And I live from my online marketing. And I live very well from it. It's just great