Unless you tell us what you want to do, this is a bit of a silly question. There will be tons of people who use CGI and all kinds of other modules, because all, or a larger portion of their Perl coding involves the web. Other, like me, avoid web coding like the plague, and will not use any of those modules.

Most of my programs won't use any CPAN modules at all. It's not that I code the functionality myself, but the programs are short enough that it's not needed. If I look at which standard modules I use most often, the following spring out: strict, warnings, constant, lib, Exporter, Fcntl, POSIX, and GetOpt::Long.

Abigail