Best/Worst Android Skins

Though stock is usually much faster and less bloated than OEM Skins, in my opinion, sometimes skins can be interesting and a good change of pace. Personally I don't really mind skins and think they add opportunities for manufacturers to differentiate their phones from other phones and sometimes some very interesting features are introduced.

For me:

Good Skins: Sense 5.0 and whatever motorola puts on the Moto X (if its even a skin)

Not so good Skins: Touchwiz, Xperia UI (I think thats the name), LG's skin

I think thats most of the skins that people see in stores and most often.

Any other opinions?