For my sewing machine, that is. :) I have a Singer school-model sewing machine, and I discovered about a year and a half ago that I can find a wide selection of presser feet (and pretty good prices!) for it at Nancy's Notions (NAYY). I already have a walking foot, roller foot, edgestitching foot, and darning foot (I think that was all), and I just got a bias binder foot and Teflon foot in the mail today. Yippee! There are a few more that I want, but I'll restrain myself for now. :)
In the meantime, I should get back to the dinosaur blanket I'm making for Thing 1. It has large dinosaurs that I'm free-motion stitching around, using the darning foot - a first! This will be a general purposes blanket for home, and I think I bought enough of the dinosaur fabric to make a matching pillowcase - just need to find something for a trim band.