Would I be nuts to pick perl over python as my main scripting/server admin language? I am a postgres, openbsd, data/text processing guy. OpenBSD is 40% perl. Postgres uses perl for its builds. Perl seems to have better text processing capabilities. But it seems to be dying out compared to python.
Perl often fits in better with the 'advanced shell scripting' type of work than Python or Ruby. It has more libraries for unix-like admin tasks, but less common support for external APIs (which more commonly support Java/Ruby/Python/etc.) so it may be an uphill battle if you use a _lot_ of external APIs.
Perl won't ever 'die out', especially if you write good perl that doesn't depend on flashy popularity-train things. It's far too ingrained in many unix derivatives.
If you're a server admin, you're missing out if you don't know perl. Choosing perl might be a little less common today, but it's totally reasonable if you want it.