I'm on the same boat. After dabbling in many programming languages, databases, various Linux and BSD distros, I made up my mind to be productive (solve problems) instead of to keep on learning and use my brain less.

These days I tend to be pragmatic and keep a set of tools: Java, JavaScript, and Python (may change to Ruby...), PostgreSQL, Linux (ubuntu, may switch to RH if I decided to pursue RH certification) and try to become extremely proficient in each of them.

I'd prefer to be full-stack as opposed to polyglot.