I don't feel the need myself, because the "really really good" ones I share out to Google Reader (one click via the lovely shareaholic Firefox extension), which

I don't feel the need myself, because the "really really good" ones I share out to Google Reader (one click via the lovely shareaholic Firefox extension), which reduces the pool to search from (and of course is easier to search). And I could star it there, if I needed. Of course that is not an HN-only solution, but that is an advantage (months later I don't necessarily remember where I encountered a story). YMMV, of course.