I find this very helpful and practical. There are tons of good sites to look through. And I like that they seem pretty well assessed from what I've clicked through so far.

You know.. it really depends on the user. I'm not big on descriptions, but others have proven useful. I like the tags personally, as it is easier to search for. Both are helpful, but you can a feel for person's way of "filing" as they use either comments or tags more abundantly.