It usually has a negative connotation, like being anti-social. A more flattering way to describe someone as odd might be to say they are eccentric. Britain is famous for, and proud of, it's eccentrics. Perhaps this is why some of the most successful artists / musicians have hailed from Britain.

I think it can. for example a person could have a funny laugh and it would not be in a Negetive way

sure, genius is regarded to be odd sometimes.