I've got speakers on my desk, so I don't usually use my computer speakers. It's easier to listen to movies and music this way.
Sometimes, it is disconcerting when I pick up or move my laptop and the sound doesn't move at all. Even weirder is when I watch movies but prop my feet on my bed. In that position, the speakers are directly behind me. Nothing like watching something in front of you but getting the sound like the people are standing at your back.