I keep hearing about Common Lisp, but I just don't "get it". Is it really as mind-blowing as people say when you "get it"?
I held off learning LISP for many years, always thinking "one day I'll get to it". Because the syntax looked funky (even though I used other languages such as Haskell which has a "non-traditional" syntax).
Eventually I just dove in, and grew to appreciate the language. The homoiconicity (the code is data, and thus data can be used as code) is something that did excite me.
Unfortunately, I never got good with LISP. Whenever I wanted to do a 'real-world' thing, I ended up fighting with the package manager. Having outdated dependencies, not managing my deps correctly or just not finding deps for things that I wanted to use.
Which also deepened my believe that programming is more about the ecosystem than the language. I love functional programming, I really enjoy Haskell and I'll solve small things (Advent of Code) in LISP. But once I need a library I'll use Go, Python or Java, or _any_ other common lang.
I'd recommend learning it though!
EDIT: I just said LISP here, but I always used the CL (Common Lisp) implementation. And I run it with SBCL (Steel Bank Common Lisp)
Also, Quicklisp can be completed with http://ultralisp.org/, a distribution that builds every 5 minutes and to which it is trivial to add a library. There's also Qlot for local dependencies, and more.