cimorene

The entirety of Red Dwarf (twice)

the last season of Deep Space 9

BlackAdder (all except the first series)

Black Books

A New Hope (but then I didn't feel like watching The Empire Strikes Back and stopped)

The making-of extras on Labyrinth, The Princess Bride, and Stardust

Spaceballs

Easy Virtue

Lewis

The last 1½ seasons of Due South

Master and Commander

L.A. Confidential

I guess I'll continue randomly selecting movies until I think of another show to marathon.

There's also a very irritating known bug in VLC in the newest version of Ubuntu and I tried all three suggested fixes to no effect so now I'm using Totem, which frequently crashes when you insert a DVD, besides being only half able to handle DVD menus and not allowing shortcut reprogramming so you have to hit ctrl+s every time you want a screencap. Eugh! Keep waiting for a fix for VLC to trickle down with ill-concealed impatience.

(If this had been listed in the Known Issues page for Quantal Quetzal, I definitely would not have installed the latest version. But of course you don't find out that this type of issue is known to people until you type 'Why fucking sound broken staticky VLC Ubuntu 12.10' into Google.)