One thin pair of long trousers will not weigh down your luggage if you wear them on the flight. Also good as a mosquito deterent at night. In the daytime unless visiting temples or wandering around cities like Bangkok you can wear shorts especially when in beach locations.
We were in Singapore last year and stayed with an expat - the norm for eating out at food courts etc for the guys was smart shorts, as in not board shorts etc and to the knee) - had we gone to any fancy restaurants, it would definitely have been long pants.
-:- Message from TripAdvisor staff -:-
This topic has been closed to new posts due to inactivity. We hope you'll join the conversation by posting to an open topic or starting a new one.
To review the TripAdvisor Forums Posting Guidelines, please follow this link: http://www.tripadvisor.com/pages/forums_posting_guidelines.html
We remove posts that do not follow our posting guidelines, and we reserve the right to remove any post for any reason.