Sadly enough, the most involved I get with anything (other than friends of mine who share the same likes), is where we are currently sitting. A forum type setting.
I could tell you what would peak my interest, but until I have any kind of hands on application, don't really know if it it will or not. For instance, I love shooting long distance, but I hated reloading my own ammo even though the idea itself peaked my interest.
If I had to choose, it would be network security. How can I get into this machine on this network to do what I have been contracted to do, or how to prevent others from entering my own network. Makes me all riled up inside.