I'm a fullstack developer only fascinated by what I don't understand.
This has led to exploring a lot of old languages such as IBM RPGLE, Fortran77, and COBOL. This has had the side effect of being considered a polyglot developer.
I respect and appreciate a lot of languages, but my favorites are still C# and Python.
I am also interested in old and low level computers. I own a couple of DOS boxes, an AS400 (with no OS), Commodore 64s, and a few TRS-80s