@maxim definitely C++ (like 90% of what I write) and some occasional BASIC (A shocking amount of industrial hardware directly runs uncompiled BASIC) but for personal stuff I've also used lots of assembly over the years (mostly x86_(64), z80, and m68k), mostly embedded stuff, hacking around on consoles, etc. I really enjoy doing baremetal stuff, hardware control, etc so given half a choice I'd use some subsets of C++ and ASM only.