Google Reader auto sort

Google Reader offers several options for sorting feed items. After having played around with the “auto-sort” for several months now, I am reverting back to “Sort by newest”.

The problem is that the auto-sort mode is a little too simplistic. Here's what it does in their own words:

The general idea behind auto-sort is good, but unfortunately the execution hasn't evolved at all to become smarter. For instance, some blogs I read haven't been updated in a while. And I'm really not interested in the stuff they wrote some months back. So I never read those few old posts and yet they continue to hang around at the top of my feeds, which gets annoying quickly.

Ideally, the auto-sort should also take into account my reading trends (they obviously collect all this data, so might as well use it). In my case, what I really want the auto-sort to do is this: if there are some old posts and I'm consistently choosing not to read them, then perhaps they don't need to be raised to the top any more. If I need to find them, I can always do so. In fact, I wouldn't even mind if the old posts were raised to the top of the list once in a while.

An even smarter auto-sort will also take into account my reading habits. If there's an infrequently updated blog that I read religiously, then I definitely don't want to miss even an old post, no matter what. Similarly, old posts from an inactive blog that I have stopped following should be given less weight.

How do you sort your feeds?