Since getting into F# as a hobbyist, it's put me off doing C# professionally. Makes doing C# for typical business dev seem like walking through treacle.

There can be a lot to learn, which is a mix of functional programming stuff (recursion-first, immutability, and getting used to type definitions and function signatures), and F#-specifics like computation expressions, active patterns and quotations.

There will be many better examples than mine, but here's some more F# cellular automata stuff from last year's Advent of Code (spoiler alert): https://github.com/lukesdm/aoc-2020/blob/main/FSharp/Day24.f...