I’ve felt that way. Since I discovered Java and programming in general from my interest in robotics(Lego robotics that is), I’ve logged hours on the computer. It bugs me that I can’t really show anything for all that time, but I also look at it another fashion.
I think programming and especially game programming is like art for the common people. I would assume that the great artists and musicians that created great works of art thought about their art all the time. For a large time of earth’s history only the rich, fanatics who were ok being super poor, or the truly talented got jobs as artists and were able to spend their lives creating pieces of art. Today though, we have Democracy and a middle class that permits more of the population to engage in creation of art. Also, like some other people said on here, there are other hobbies out there that just deteriorate the brain’s abilities like TV watching or constant video game playing. Programming forces us to think and to expand our knowledge. True most of it is knowledge of computers and technology concepts, but IMHO computerized-technology has created a new universe of materials that humanity is slowly accepting as almost “real.”
Also, I’m a Christian, and I believe that when the Bible said humans were created in the “image of God” that really means humans are creators like God is a creator. So, can we really help thinking about our creations all the time? God thinks about His:humans.