I'm with you in that I like "light" bondage, but nothing too rough. I don't enjoy if the girl seems to hate it. Good light bondage keeps things comfortable and focuses on two things in my mind: 1) a respectful shift in power, and 2) it is aesthetically pleasing. So as long as those criteria are met, I love the idea of a tied up blowjob. I'd stand back and masturbate for awhile, then fuck her mouth for awhile, then touch her body, then decide where my load goes.