I used to break my household computer on purpose and try to fix it before my parents got home (I've always liked a challenge). Now I herd geeks and enjoy reading about communication techniques.
Even though its not what I do for a living, I'm still terribly interested in how "things" work, for almost any definition of "things." I'd really like to learn more about removing malware, because I'm terribly practical, plus it really piqued my interest when I was forced to look into it recently. Malware's come a long way since I was a kid breaking my parents home PC