Writing Question

Do you ever feel tempted to go back and improve your earlier fics? I've developed so much as a writer over the past year, and now a part of me can't face reading my early work, or the thought of others doing so. However, a lot of my stories follow on from each other, so deleting the early ones would be a bit tricky. People seem to enjoy them, though not uncritically. And the criticism I do receive is usually constructive and justified.

I just wondered what other writers tend to do - let early work stand as a monument to your inexperience, or go back and polish?