Dead right. The ONLY thing I miss about work is people. Colleagues or customers. Luckily I play golf three times a week so have plenty of interaction there@artie: I must agree 100% with the above posts - those that talk about volunteering in various ways. Also don't forget the "Mens' Sheds" organisation (which we don't have here BTW).
All the above point toward one of the things I consider VERY important, i.e. meeting & "working with" new people. IMO it's important that whatever your interests are (or become), that you don't restrict yourself to something solitary with no interactions with others.