I think Modular synthesis has been one of the more intresting topics i have found, but it is a bit expensive, even DIY solutions are expensive ....
This website and vaporwave are also one of the things that i found
Fighting games are very intresting also, because it is way harder than it looks
lots of different music genres like hyperpop, digicore, IDM, breakcore, ambient, Neurofunk ...
Cryptography, steganography, forensics (art of hiding and finding stuff in files/text) are all really intresting topics; however they are very complex, and i don't understand all
balisong flipping is also a hobby that i would like to try, but also too expensive just for trying
....
do you recommend a topic that i should check out ?