I travel for a living and have been to Singapore at least 30 times, I'll be there later this week. As cities go it's nice enough and it is clean because of the police state mentality. It's also crowded, hot, muggy, very restrictive, and expensive. There's no way I'd choose to live there, I'm always VERY happy any time I get back home in the U.S. where I can breathe fresh air and basically do what I want whether that be get in my car and take a road trip or hop on my ATV with a rifle and go shoot a bit on the back 40. You're not going to do that in Singapore.
I'm glad she's happy in Singapore, but living there permanently would be a special kind of hell for me. There's nothing that appeals to me about it.