Chiang Mai: My favorite city was Chiang Mai. You'll find the best food in Thailand and amazing adventure activities. We when white water rafting, rode elephants and hung out with tigers. I loved the cooking class at the Four Seasons with a visit to the market. Don't miss this city when visiting Thailand!
Phuket: Even though we were given advice from friends not to stay in Phucket because it was too touristy, we really liked it. The best part is the beach and the huge waves made it so fun to play in the water.
Koh Phi Phi: Tranquility. This is the place where they filmed "The Beach" with Leo DiCaprio. It feels like you have the island to yourself and the individual huts were so cute. We hiked all the way to the town and had a blast. We also went scuba diving for the first time. I found it a little scary, but fun.
Bangkok: I'm not a huge fan of cities when I travel, but Bangkok has some GREAT shopping. You cannot miss their weekend market. Also, it is worth doing a guided tour of the city to see all of the beautiful monasteries. You've gotta take one of the James Bond boats into the river. We liked watching the Thai boxing match. A little brutal, but highly entertaining.
Thailand is still my favorite trip ever! If you haven't been, book your trip!!