I love the freedom in a side project to write a thing, then rewrite it, then decide on a new requirement and rewrite it again. No deadlines, no stress, just incrementally experimenting until I'm happy.
At work they rely on me to deliver in a reasonable time, and move on to the next task. Once something is working, it generally isn't changed too much, even to improve it (obviously if it's really important to improve it we make time for that, but that doesn't happen so often)
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