@zrail I love to try something new... I've only had a couple years where I had time to try something new during #AdventOfCode, though. I learned Haskell and Rust that way.
This year I'll do most of it in Python, where I'm fastest, but go back and do especially interesting ones in Rust. There are usually a few where I think the data structures will be tough for me/interesting in Rust, so I'll do those.