Being, the purpose of tilt shift is to to be able change the angle of the focal plane, and is predominantly used for product photography (like jewelery), food photography, and architecture. The phenomenon of the "miniature" style photography actually goes counter to the purpose of the lens. For the miniature effect, you are severely decreasing the depth of field by tilting opposite what you normally would. It's also an interesting psychological trick. Super saturating colors add to the effect of the image being "fake" or a model. The effect is overdone now, since people fake it in photoshop, by adding blur.