I'm with Voltaire on this one. I love living here for the obvious reasons (generally great weather, access to a ridiculous array of travel options), but I also enjoy Yunnan for the lack of pretentiousness in both the local and foreign communities.
The local food here is better and more varied than anywhere else (you just have to look).
Yes the traffic is often enraging and Kunming needs to work on preserving what is left of its air quality, but in general, for those choosing to live in a major city in China, this place beats the rest on character and charm alone. For me at least.