My Nintendo ranking goes like this NES>SNES>N64>GCN>Wii>Wii U. I honestly might have played the N64 more than the SNES due to Bond/Perfect Dark alone, but SNES just has the massive library of awesomeness.
Wii U being the lowest does NOT mean it's the worst, just that it's only been out a fucking month, I would be surprised if it doesn't at least bump up ahead of Wii and GCN eventually.