Thanks terryboy. I flew through London, overnighted there just for the sake of my sanity, then to BKK (12 more hours in the air). Business and First class give you lay-flat beds/pods, so I too slept for most of the flights. But even with that, I was zonked afterwards, and bored to tears. It may make more sense though to fly direct to HKG or BEK like you did, then do the shorter hop to BKK. On the return trip I travelled for 32 hours all told. Soooo painful and boring!!! Lol. Maybe your routing is better.
Where do you guys stay in Pattaya? I researched all the various boards (ie. pattaya-addicts) plus trip advisor etc. Wound up at the Natural Beach on Soi 11, and the Holiday Inn by Soi 3 for a couple nights when I got tired of the noise at the Soi 11. The Natural Beach was only 1200 baht a night, with no joiner fee, for a normal but OK room, but it had a keyed safe rather than an electronic one, which was a nuisance, and was noisy. The Holiday Inn though was over 5000 baht a night for a great room with a beach view.