The following question has a score of -1 votes, and 4 close votes: https://superuser.com/questions/419400/where-can-i-buy-micro-express-microflex-23b-in-europe
I do not think it should be included in the Top Questions list. Also, notice the
[closed] question above it! That being said, I think the algorithm needs an update, at least to reflect that some questions are poor fits for the site:
If the question has a score greater than N votes, include it, else,
If the question is closed, do not include it.
If the question has more than 3 close votes, do not include it.
If the question has a score of less than 0 votes and if there are no answers, do not include it.