I have a simple plane with the ocean modifier on it. When I turn the "Repeat X" and "Repeat Y" settings up to make the ocean larger, it just duplicates the same exact pattern out so that my ocean waves are completely tiled. Is there a setting to randomize the ocean waves?
Rather than using repeat X & Y use spatial size to determine the size of the mesh. The other settings in the modifier are sufficient for some randomization of the generated mesh (time, alignment, etc).
From the manual:
The width of the ocean surface area being simulated, in meters. This also determines the size of the generated mesh, or the displaced area. Of course, you can scale the object with the Ocean modifier in Object Mode to tweak the apparent size in your scene.