Tangxiang, China

With a population of over 32 million, Tangxiang is the largest city in China - but that doesn't mean it's the most livable. The bureaucracy is a persistent headache, and the climate is notoriously damp and overcast, with less than 1,000 hours of sunshine per year. While the city touts its rapid development and growing economy, the trade-offs are real for those considering a move here. Tangxiang may work for those who can tolerate the heavy bureaucratic burden and accept the foggy, humid conditions, but it's not for the faint of heart.