Last year I used mainly crystal. This year I’m thinking pharo smalltalk, if I can pick it up in time
I also want to do visualizations, not sure how possible that is with smalltalk.
Go, out of the languages I use at work, it is the one I learned most recently and have the least experience with. I am not planning to get on the leader board (or even comple more than the first week of challenges), but it is an excuse to get more comfortable with the standard library.