The folks at Hunch did this excellent comparison between Mac and PC users, using their recommendation algorithms. Hunch uses a “Taste Graph” system to try and see what correlations exist between things that people like on the Web. Using this data they could quickly see differences in what Mac and PC people like – for example, Mac users prefer to snack on salty snacks, but are also 80% more likely to be vegetarian… And Mac people’s favourite TV Show is The Office, whereas PC users also like South Park.
You get the idea (Click to Enlarge):
