The satisfying click of needles when you finally cast-on after a long drought.
Tomatoes. I have zero luck with gardening. Gardening requires you to run on the garden's schedule. You can't put it aside until inspiration strikes or you find the right shade of yarn. You can't say, It can wait until next week. But I am hopeful. See - they're 4 inches high and I haven't killed them yet. :-D [Insert tiny, quiet 'yay' that couldn't possibly court contempt from the gardening spirits here.]