My next visit is 3 nights Pattaya, 6 days Bangkok, 6 nights Siem Reap, then 4 days Bangkok, so different venues to break up the time. On the business class issue. I have a 12 hour flight, and I am lucky enough to be able to fly business class. As you get older, I am 70, I reckon it saves you a couple of days of exhaustion. My flight takes off at 10pm, meal, drink, sleep 7 hours, arrive BKK 3pm, hotel, shower, ready for night out!