I like the thumbs up / thumbs down system on Eurogamer, it makes it really quick and easy to find the more interesting comments because each comment has a green or red number next to it displaying the level of positivity/negativity for each comment. Also it's fun going through the comments section and backing certain opinions that are similar to you own, especially when you don't want to duplicate the same kind of comment, or if you can't be bothered to type anything out but want to express what side of the fence your on.
Anyway,seeing as though I prefer this site to Eurogamer I would like to recommend that you implement the same system. That would be cool!
Please note that I have no idea if that would be a serious undertaking or if it has been suggested before. But I did a general search for similar topics and found nothing. Hence why I'm posting.