I use my 1/4 piecing foot, appliqué foot, walking foot, darning or FMQ foot, zipper foot and my regular zig zag foot. I have a few others but only use them occasionally.
What I would love to get is the ruler foot for my Bernina. I think it is #95 but it is only approved for on a quilting machine rather then a regular sewing machine. Hope they come out with one for the regular seeing machine soon. I would order the Westalee ruler foot but I don't know if it will void my machine warranty to use it.