Muscat - beautiful mid sized city.. small enough for one to know almost every corner big enough to keep discovering new corners all the time. its touristy without having too many tourists, its quiet, its happening, its very ethnic, and very aesthetically pleasing. beautiful place.
Karachi - its really beginning to come into its own past 3-4 years. reason i like it is that its the only city in pakistan thats actually a "proper" city.
hate the weather tho.