Though we are in favor of orbital space settlements instead of surface based ones, it is still interesting to consider other options. Mars is an obvious choice to locate a human outpost, but there arguments in favor of Venus. Here couple of videos explaining the possibilities and benefits of colonies on Venus.
Not mentioned in either video is the fact that the atmosphere of Venus contains a significant amount of sulphuric acid, which has multiple uses in industry.
Floating colonies in the Venus atmosphere would also be useful when it comes to designing atmosphere based colonies on Uranus.