For example you might want to measure several reactions such as: interesting, funny, angering and sad. Slashdot does that. To vote for a post you have to pick

For example you might want to measure several reactions such as: interesting, funny, angering and sad. Slashdot does that. To vote for a post you have to pick an adjective. I always thought it worked well, because it showed what kind of content would be valued. For example "funny" is an adjective you can pick, which signals the site valued funny comments. I had some great laughs reading it back in the day.