I was just in Thailand 3 weeks ago and wow it was awesome! Chiang Mai was great with a good selection of girls, really calm compared to Pattaya and Bangkok. Walking street in Pattaya is great!!! So much packed into this street.
As for Bangkok, I didn't like it, too much noise, people and not as easy to get around! If I went again I would just stick to Pattaya and Chiang Mai since its cheaper too. Plane tickets to Chiang Mai are cheap too from Bangkok, I got a round trip for less then $100 US dollars. Damn I might just go back next month!
kruptionk you ever been to Foxy lady in Chiang Mai? Not too bad of a go go bar, not as wild as Pattaya but still a great place.