First, I'll say my LEAST favorite part is MAKING DECISIONS.
Second, My FAVORITE parts are all the rest, buying fabric, ironing, figuring easiest way to make a multiple number of blocks, (hard time deciding which fabrics to use), cutting, piecing, sewing, ironing, laying out (although too much time deciding final layout), sewing, borders, and ... I'm just starting to like 'sandwiching' the quilt for machine quilting and the binding part.
Wish I could figure out how to make decisions!