I really dislike reading comments on articles on most websites. I find that comments rarely contribute to the article and are often just a waste of time.
The only comment structure I have found to have meaningful content at the top is on reddit. This is because reddit has a terrific voting system where users can vote on each comment allowing the best to rise to the top.
I would love it if reddit released a product or API that allows any website to use reddit's comment structure. If reddit created such a product, the quality of online discourse would improve overnight. I'm looking at you Youtube.