I would absolutely love this feature.
I've thought about it myself, but for some reason never suggested it.
I mean, the thumbs/comment count thing doesn't matter much to me, personally. But I can see how it'd be nice for some people to use.
But I'd love it if the Subs could be sorted based on type. Especially if you're the type of person who answers however many questions a day, it'd be nice to filter those submissions out, and just look at your other Subs.
That'd be nice for people who are actually looking on someone else's page for their submissions, too. Like... if I want to see what other Game Hints you may have submitted, I don't want to have to search through the hundreds of answers you've given.