Bangkok and Singapore, I spend an equal amount of time in each place, I fly up and down almost alternate weeks. It was disruptive at the start but I kinda got used to it.
The pros:
-the adrenaline of flying every week (SQ J) doesn't get old and I always enjoy the experience.

-the change of scene is welcome and I tend to get sick of a place if I spend too long in a place, I like that my lifestyle is 'broken'

-adapting to the differences and trying to stay on top of the local language - I always seem to forget some Thai when I'm in Singapore. I like the challenge of working in two environments, it keeps me mentally stimulated.

-exposure and meeting new people, enjoy developing multiple social circles.

The cons:
- for 6 months my social life went out the window in both places because I wasn't able to commit to any hang-outs or parties and I ended up disconnected. It made me feel like an alien in two cities rather than at home in two cities (socially) but this settled over time.

-homesickness, I grew up in Singapore, my life is more organised/established there - I still feel more comfortable and consider it my 'home' environment.

- my diet suffers because I don't stock up groceries at my place in Bangkok with the same care as I do in Singapore, time constraints.