I just came from Koh Lanta. Amazing place, quite literally the most beautiful one I've ever been to. I spent a few days in Ko Phi Phi, which is great for partying, then went to Koh Lanta to chill. It's incredibly relaxed vibes. I went to Hong Kong afterward and spent the whole time there missing Koh Lanta!
I've only been to Koh Phangan and Koh Samui before so I'm definitely looking forward to checking out the Andanaman Sea side. Since I'll be working I decided I don't want to move around islands, just pick one place and work there.