I tend to look at my works from the past few years a lot, and I find myself frustrated at them. It's not that they're necessarily bad, the composition or idea is nice but execution wise there's a lot to be desired. Anatomy flaws, rushed execution, bad color/value/saturation grading, etc etc.
They're right on the cusp of me being fully happy with them. Not enough to warrant a redraw... so I figured, why not revisit?
So I opened the original master file and just... continued! And now? I can say I'm pretty happy with it!