Excited for this year's version. I did last year's event in OCaml which was a challenging, yet very rewarding experience. Still trying to decide what language to use this year.
This is my first year participating in AoC and I am going with Elixir. I think this will be a great experience as I can try solving the problem on my own and then watch Jose Valim's approach live on Twitch. Here is more information if you are interested: http://blog.plataformatec.com.br/2018/11/lets-learn-elixir-t...
Yes, Rust is my other option I'm leaning towards. In process of learning it by building a ray tracer, so doing Advent of Code would be another way to get more familiar with it.
Always had been fascinated with functional programming, but kept stumbling with Haskell. Discovered the Real World OCaml [0] book and was instantly hooked. Sadly haven't been able to use it much outside of last year's Advent of Code and a toy ray tracer.