LISP, Forth, SNOBOL4
They were ground-breaking and under-appreciated at the time.

Perl.

I like duct tape solutions.

Q: why is that Perl programmer slacking off while everyone else is working?

A: because he finished his work already.

When I was in high school, I had the option of continuing with German IV second semester or Pascal programing. I took Object Pascal. The first modular language I had ever used. Had a blast with it. An acquaintance of ours developed the first Hand To Hand combat game I had ever seen (a weird version of mortal combat, sorta) which, if he had a money mind, would have made him a bazillionaire.

I really like Max/MSP. It's proprietary, not that versatile (unless you know Java or C++ as well) and it could be argued that it's not truly a language, but it's fun!

I'm a full-stack web developer, so the scope of my programming is generally limited to websites and web applications. I like PHP for server-side scripting, largely for its ease of use, flexibility, power, and ubiquity.

Collecting programming languages? I don't get

My favorites are Python and MATLAB

I wish I could remember more of it; COBOL.

Apparently, there's still a demand for programmers who can use the language, and banks are paying shitloads for people to maintain their systems.

It's amazing that the language is still around after almost 60 years.

Being truly good at a language needs a lot of practice. How much do you actually learn for each one, or is it just meta analysis of features that draws you to it?

How do acquire and collect programming languages. What are programming languages. Why do you like collecting programmming languages. I'm interested in knowing especially what interests you in such a hobby. Thanks!

Julia (not really a favorite, just one I'm trying to use)

I just finished a bevy of CS courses in programming, out of them all, I understood and was able to code in SQL/PL-SQL the best, was ok with VB.Net and C. C++ kicked my butt, mostly just couldn't connect with the instructor. I took the classes only to be a better QA and support person, not for programming. I would like to find a job as a SQL coder for sure though.

Collecting? So not learning them?

I'm a web guy so JS, PHP, etc are my current tools.

My favourite was Flash Actionscript - way ahead of its time. I could both code in Flash AS and create frame-based animatation by hand. Unfortunately, the plug-in tech was simply too easy to hack.

Toss up between C# and T-SQL.

JavaScript, because it works on everything and does not require an IDE or lengthy compiling time.
Asteroids in JavaScript
[gsc.jobs]

APL (A programming language). This was the first language I learned and when I learned other languages , the first thing I did was write functions that equated to the APL primitives. You could write an entire application in a dozen lines of APL code.

I started out writing BASIC code on an HP-85 back in the day. I did PL/1 for a couple of years in the late 80s and enjoyed it. Anyone else worked with PL/1?

In that same timeframe I also wrote quite a bit of IBM 370 assembler code and always that it was a rather nice and not obtuse assembler.

I’ve also done (for a living ) COBOL, Fortran, C , Objective-C , a whiff of SNOBOL, Perl, Java , a bit of JavaScript when I have to , Python , R, and a couple of proprietary languages.

I also do tons of crazy SQL in my data warehouse works. I primarily write Python and R these days. Love Python and becoming fond of R/Shiny too.

My favorites are modern OO C derivitives combined with SQL.

@Trent What are your favorites?

My favorite is Javascript (ECMA-262) but it's common and thus not collectable. For a collector, I'd suggest an obscure one like REXX. Or how about Microsoft M80 Assembler.

Simons Basic for the old commodore 64,
because it is so easy, but has more functionality than the original basic.
Dabbled in Cobol and Fortran but I am not a programmer, my head won't do it,

I am still a DOS man. I started with it on CompuServe before GUI's or mice. Very quaint, even though ancient!