Great - so how about telling us a little more about what you think is cool about it?
What processor(s) do you code for/with?
What tools do you use? Which, if any do you prefer?
Are you working on anything just now? If you are, care to discuss it?
I learned 6502 assembly on an AIM65 ~20 years ago and forgot most of it ~19 years ago. I dabble very occasionally with x86 stuff whenever the mood takes me which isn't often. I use the GNU assembler and don't mind AT & T syntax which many seem to deplore. I'm only now beginning to get to grips with using extended inline assembly syntax with the GNU assembler and learning the subtle differences between how gcc and g++ handle inline assembly, particularly variable declaration scope/syntax.
It's a billion light years away from rocket science/operating system development but wtf? It's - well, 'cool' is as good a descriptor as any.
edit: When I started fiddling around with the GNU assembler I found the -S switch invaluable.