Most websites treat “I like it” and “This is good” as the same thing, leading to most people on the Internet refusing to distinguish between “I don’t like it” and “It’s not good”.
From Ten Rules of Internet by Anil Dash.
IMO, Yelp is one of the very few major sites out there that attempt to distinguish between “I like this,” and “This is good.” You can rate our reviews as Useful, Funny, or Cool, but you can’t like them.
You can (and I have) made arguments regarding how providing only a single method for feedback will increase feedback, but no matter how true that might be, if your comment is centered around providing value over entertainment, asking your users to at least try to distinguish between “I like this” and “this is good” is an important part of quality control.
Being able to say here’s what we built together is way more fulfilling than posting a mockup that never saw the light of day to Dribbble.How to ship good design — Building Potluck — Medium (via allisonacs)