Krabi Ao Nang main beach we didn't like. The other beach there looked better but we had a lot of rain. I would never choose Krabi for a holiday, all the people that try to get you in their restaurants is so irritating.
Phi Phi island was very nice, go to Long Beach and make trips to other islands.
The rest is more a tourist trap with overpiced hotels (still cheap for tourist) and 1 day visitors. But it is nice for some days.
Maybe i must visit Hua Hin, could be nice also, good tip.
I like the more quiet beaches without the tourist that have holiday for just 2 weeks.
Koh Lanta has some nice beaches, but cause it is low season and not many backpackers it is too quiet at this moment. The prices are 1/2 compared to high season, that is a good thing.
Pattaya is a shithole you must avoid! It is a dirty, sleezey, place. A lot of Russians think they go on a nice cheap beach vacation and end up in the city of prostitutes with their families. Maybe their English is bad and they didn't look up how Pattaya realy is. Also a lot of Arabs that go there to the clubs for blond Russian prostitutes. I go there cause my webmaster friends live around Pattaya and than it is nice to meet there before i go to the beautiful Island of Koh Chang or move further to Sihanoukville. But seeing Pattaya can be fun, go to Insomnia for a beer, see the crazy people in some bad bars. You will see some things you will never forget. I don't know why people stay there longer, everywhere in Thailand are girly bars where you can find the same, without the extreme dirtyness of Pattaya. Can you imagine a bar with 250 girls screaming Hello, you come in? Than you must go there in low season. After 2 nights there i want to go far away and get the dirt of me. Last times we met in a normal pub, much nicer bacause you can have a talk without the screaming woman around you. When it is old and have a beer belly, can't hardly walk normal beacuse of their condition, you know they are screwed, avoid those people!
Looks like the old man always has the most beautiful girls, they have to pay more than everyone else, but they don't care because their life will end soon
I can't imagine you want to walk around with a Thai prostitute, fun to play at the pooltable and than they become annoying to me. I prefer the backpacker islands and have a good talk with Western people or the Thai peole that aren't working in a tourist place and just want your money.