Another suggestion: Adding a small section above the top10 with a random link from "new". And for that link, you need to click yes or no depending of if it is interesting.

What I like about this approach is the randomness in it where random people get random link. I also like the fact that by you aren't choosing between 30 links.. you only get one and you need to say if it's interesting or no. Also, I like the fact that it's on the front page.

So, the top 10 links could be the most yes-ed in a certain period, or the ratio yes/no ratio, or anything really.. You could also put more weight on a yes if you've got more point in HN (Simply because I usually trust their judgement.. for instance, they know when something has already been shown dozen of time)

Also, it feels a little bit more like a game to me.. each time I refresh I need to really participate to say if that special link is interesting or no.. :D