Hard for me to pick a favorite.

Lisps:

Clojure(Script) - Very productive language with a great ecosystem of libraries available. My favorite libraries are re-frame and cljfx.

Janet - Borrows from Clojure in terms of syntax. Super small package (1mb). Produces small, statically linked binaries. The ecosystem is in its infancy but I see it as having a lot of potential.

Games:

GDScript (for Godot) - A lot of people agonize over using C#, Rust, C++, when writing for Godot. I find GDScript to be very intuitive and productive though.

Embedded/Micro Controllers:

Forth - Makes an appearance on HN pretty regularly. I describe it as a backwards Lisp without parens. Being able to develop interactively on something like an Arduino Uno using FlashForth is lots of fun.

For me still Python. It just makes it easier for me to build solutions to the everyday problems I need to solve. When I have a little itch that needs scratching Python is what I reach for first.

Although I'd been a dabbler with Python for many years, about 6 years ago I had a problem to solve. Basically it was to spider and download a static site, clean up the content, add metadata, and pop that content into a database. At the time I was mostly working with PHP for such things, but decided on a whim to give Python ago. A couple of hours later it was done. Python made that project so painless. I've never looked back.

Since those days I've built many projects with Python, including web apps (using Flask), utilities, database apps and so on, and never regret choosing Python...

C. Not C++, just C - although I have often used C++ as a "C with classes" alternative and disregarded everything else.

I don't get to use it too often, as the nails that need that specific hammer are not super common. But it is definitely the language I like the most.

TypeScript! It hits a really pragmatic sweet spot between strong typing and fast development speed. Plus being able to use the same language for both the front end and back end (and in some cases share code between them) is a huge win for productivity.

Julia, Anglican, Elm, or C.

it definitely depends on the application, but these are some of my favorites. I really want to try rust.

I'd say Elm, mostly for the joy it creates when I write it.

Ruby, JS/TS, Rust

Scheme. So clean. So easy. So mind-stretching.

CopyPaste running on Stackoverflow /s :)

Swift.

C#

javascript