I didn't answer the poll because both do it for me under different circumstances. It is completely mood driven. I like to watch if it isn't the "cheezy" stuff. I was reading a book one time and it was so intense that I didn't want to stop reading and by the time I finally couldn't stand it another second, I was already on the verge of orgasm and it didn't take much to get me there.
Damn! I wish I could remember the title of THAT book!