Drawing at night leaves me severely restricted by the cord on my headphones. Even then I still can't make too much noise or I'll wake people up. Excuse me if I like to talk to myself while I work... hell, sometimes if I forget to press play on the song, I'll sit here drawing while I hum and mumble and sing randomly and incoherently to myself, damnit!!
As an introvert, I find myself incapable of doing much of ANYTHING while physically in the presence of other people... honestly, if there's even a single other person anywhere in the house I feel severely limited in what I can do: drawing, talking, enjoying music, video games or tv/movies... although, usually it's because they're all just SO DAMN NOISY... oh, haha, that's funny it looks like I typed 'nosy'... and, well, yes they ARE nosy.