So I see many of you around here use

assembly. Is it just trollin' for /prog/, or do you actually perform your general-purpose programming in assembly? Is it really feasible to be a productive programmer by using just ASM?

It's feasible to write solutions to Project Euler exercises in ASM. It's also feasible to write simple games. But mostly you want to leave register allocation to the compiler, so by writing ASM directly you are probably shooting yourself in the foot. At least use something slightly higher level like LLVM IR.