NoirVisage
Banned
Randomization gets more of a bad rap on GAF than it deserves, I think. There are a lot of games which use it to great effect, and most of the ones named in this thread wouldn't work without it. Minecraft would lose a lot of its exploration appeal with a preset world, and games like Isaac and Spelunky would get extremely tedious if you had to re-traverse a static world for every game.
On the flipside, I've seen some discussion (especially in the roguelike community) that every game would be better with randomization -- i.e. what if Mario had random maps? -- which completely ignores the benefits of good, intentional design.
Random/procedural design is really just another tool in the toolbox. It's one I wish more mainstream developers would take advantage of, but it can also be overused as a crutch to avoid designing interesting content.
Well put!