In piles. Sometimes with leftover food on/ between them.
Some stacked on the player, some stacked on top of the neat row on the shelf.
Some in the corner gathering dust.
Most of them are in cases. And most of those are in the correct cases.
Sometimes I write short limericks on post-it notes and put those in the cases instead of the disc. Mostly as a joke to the people who borrow my movies. They love it.
Oh, and I keep tv series separate of course, I am a bit of a neat freak after all.