At work:

• Configurtation management automation (deployment control, et al. with CA Allfusion Harvest Change Manager)
• System administration
• Test scripting

At home:

• Cryptography hobby (See brief discussion on my home node)
• My daughter is doing a Science fair project on the affects of Caffeine on Memory and needed several lists of random numbers. I got exactly what she needed in a Perl one-liner and redirected straigiht to the printer. It was 10 minutes including the time to download Activestate.