I wasn't sure what to expect with respect to seat comfort and pitch as I had never flown AirAsia before. I knew of the so-called "Hot Seats" but read that the pitch of those seats was not more than of any other seat on board.
Either way, I just picked the regular seat shown below.
As you can see the pitch is relatively tight for a 6'2" tall male.
Although a bit uncomfortable, the flight only lasted 45 minutes or so and I thought it wasn't soooo bad for that duration. Note that everything on board was for sale, even the water. I had brought my own so I decided not to buy anything.
After landing in DMK, my bag was quickly loaded onto the baggage belt and I was on my way to Le Meridien Bangkok.