You know, my problem isn't inhibitions about the juvenile activities that I do. I have no hang-ups with being a computer gamer at all. The problem is that I do computing activities which are far more mature - and far more obscure. There's nobody outside a computer-science context who wants to hear about 2,000-word essays on computer technology predictions. The same applies to my interests in automotive technology, aeronautics and spaceflight.
The juvenile activities are easy to justify. It's my interests in other things that are difficult to explain, particularly as I'm what you may consider "eccentric" anyway.