Over the years, I have had a few guys I would off every day during trips to Thailand. A couple of the guys I saw over several years until they had moved on. If I find a guy that pushes my buttons, I look no further.
As far as performance, if the boy's service declines, I just move on.
However, on some vacations to Thailand, I have done the butterfly routine with a new guy nearly every day.
If I am lucky enough to find someone I like, often after a few days with him - to be sure we're compatible, I'll ask him to travel somewhere with me. I did this on my last trip in Jan-Feb, taking the boy to Koh Chang for five days. I like the BFE experience, if I can find it. (In this case, BFE means Boy Friend Experience, not Bum Fuck Egypt).