I'm super optimistic, and I never worry. I've lived in a lot of different places and am good at adapting and being content. Also, I'm not afraid.
I really appreciate an open minded, laid back approach to life. I'd say sense of humor, but everyone thinks they have a good sense of humor so self-selection there is kind of pointless. Good conversation and physical fitness are more important than just about any other criteria.
If your definition of success is financial, you are not succeeding, amigo.