1/ You will be woken up every day at 4 am by the calls to prayer.
2/ As I understand it, the cost of living is higher.
3/ The climate is hotter
4/ Women not as available ( Muslim country )
5/ You need assets of USD 80,000 and a monthly income of USD 2275 for a retirement visa.
6/ The air is less polluted.
7/ Food is a 50:50 proposition. I prefer Thai, others may prefer Malaysian.
8/ More people speak English.