Been to a good few. Good fun if you're wasted. Koh Phangan is a bit of a dump nowadays though unfortunately.
It is around Haad rin but head west to Haad Salad or Mae Haad and it's beautiful. Snorkeling right off the beach and only a handful of people on koh mah a few weeks ago.
Any dos / don'ts / must sees in Bangkok then? I'm going to be in Bangkok for 5 days I think. My main concern is the dress code for temples etc? Any girls been? Will a skirt that is below the knee and a normal t-shirt be OK for the main / stricter temples? Or is it even more conservative than that?
How easy / safe is it to get around there? I'll be on my own. And while I'm quite used to travelling alone, it's good to know whether any extra vigilance from my usual level is necessary?
You can wear shorts to most temples in Thailand with the exception of 2: Doi Suthep and Wat Pra Kaew (Grand Palace). Wear jeans or trousers, but if you turn up in shorts you can usually rent a pair of pants for a few hundred bhat.
Memorise the BTS and MRT maps, they are easy and good to use to get around. Everything is double sign posted in English too. to be honest I didn't take to Bangkok too well first time I went, but I had a bad run in with some of the soi dogs. Plus don't stay in Sukhumvit. If you plan to hit nana plaza and cowboy every night then ok but otherwise it's the shadiest part of town and everything is generally more expensive because farang mak mak there!
Couple of do's and dont's from me.
Don't buy anything in Sukhumvit market, it's all hiked up for tourists, if you want to shop go to Pratunam or Chatuchak weekend market
Don't shout or raise your voice if you get into an argument
Don't point at someone with your hand
Don't get a tuk tuk as they are rip off, elsewhere in Thailand they are ok generally
Do go to lumpini boxing stadium, closest thing to a ringside boxing match and it's as real as it gets
Do take a walk down soi nana at night :-p
If you go to a cinema, DO stand up when the national anthem is played. They love the King over there and any pissing about can get you in trouble.
Bangkok is ok generally but 5 days is maybe too much imo. Get out and see some places that are close by like Samut Prakarn where you will see a scaled down version of all the temples and great monuments in Thailand. Also check out Kanchanburi, Bridge on the River Kwai ect.. also the old city Ayuthya.
You shouldn't have any problems going solo in Thailand, many do. I just got back myself 2 weeks ago and am missing it big time. I should hopefully be back around Songkran time.
Where else are you going? Chiang Mai is really nice, and cheaper compared to Bangkok. I found the food nicer there too plus everyone didn't seem like they were out to rip me off. Not saying I feel that way all the time in Bangkok but people are generally friendlier up north.
Haven't been to Krabi but I heard from my cousing it is awesome.
Krabi is awesome. I stayed on Ao nang which was a nice jump of point to do Island hopping. Raileh is a bit nicer and you can still get to all the same places from there but there are more shops, more bars and more of everything else in Ao nang.
I set up a blog for my trip. I still need to update it, will do this weekend but there are some pics and info on Krabi and some other places.http://kunstevie.wordpress.com/author/kunstevie/
FYI For those that have been how did you find the toilets out there? At first I was like wtf is this jet spray thing. But after a while I actually think it's cleaner than what we do over here.