I've been on Reddit for four years, and I don't think that it's usable for even hardcore users. The people attracted by the front page invariably find their way to the subreddits too. And the overall mood of the place encourages even the best users to be goofy.

There are still good submissions in very small and highly technical subreddits, but those get very few posts.

I visit reddit because I'm honest-to-god addicted, but at some point my self respect is going to win out.