Would it be possible to have, in the "Top Questions"/"Home" page, the number of comments next to the number of votes, answers and views?
Comments are second class citizens on Stack Exchange, so they're less visible than questions and answers. The main problem is that (without reading them), the number of comments* conveys absolutely nothing. It could be that the question is rather unclear, and the comments are trying to clarify (but you don't know whether that was successful until you read them); it could be that there's a lot of discussion (in which case the comments aren't even used for their intended purpose). Users may leave a (partial) answer in a comment, but again, that's not their purpose, and such comments should be converted into a proper answer.
Space is at a premium, especially often viewed pages like the question lists. So I don't think it is a good idea to add the number of comments to those pages.
*: under the question alone, or the entire Q&A thread? Anyway, it doesn't matter...