I only use CGI, I really don't like programming for the command line. But here are a few projects that I find interesting.
HTML parsers/code analyzers
Image manipulations with ImageMagick (very fun!)
System analyzers (calculate RAM, CPU information, OS information, etc)
Create an FTP client in Perl..not sure WHY, but it would be something I'd personally be impressed with!
Games are always fun-- Guess a numbers, Hangman, Tic Tac Toe with AI!
"Age is nothing more than an inaccurate number bestowed upon us at birth as just another means for others to judge and classify us"
sulfericacid