Christmas and new year were busy for the southern-islanders, Had-Rin is always bouncing but this year I hear it was quite busy. As per usual the northern end of the island was pretty dead, not much happens up this way, but thats the way we like it. By all accounts the island seems to be developing into an ibiza-style of resort with ee-d up tourists spending a couple of days here during the full moon and then slinking off on the Raja to the mainland.
I remember in the not too distant past I could go out and party all night quite easily, I am sorry to say that those days are long gone.
The first time I came to Koh Phangan, like everyone else we went to the full moon party in Haad Rin - one of the biggest destinations for backpackers in Thailand. Its a headonists playground, a mulitude of bars along the sunrise beach serving alcohol 'buckets' of various concoctions, all playing their own distinct brand of music at a volume that leaves your ears buzzing for a day or two. The first time I went [6 years ago], it was fun - granted I may have got a bit wasted on that visit, but thats ok, you are only young once.