i love my 1/4 inch foot - it also has a slot that allows me to achieve a 1/8 seam and 1/2 inch seam.
then i love my embroidery foot that i use for free motion.
then i love my open toe foot that i use for applique.
then my cording foot which i use to couch thick threads to the quilt top.
i have a singer and a janome but i really don't have a favorite sewing machine brand i've always had success on whatever machine was in my budget.
my quilts don't sell for any more money because i purchased a fancy sewing machine.