I'm with Mary Elizabeth -- the last thing I need is to find someplace to store yet another thing in my Kitchen! For a Cleanup Sink, I much prefer a double-bowl sink. The larger bowl in our sink fits everything except the 3' wide refrigerator shelf -- all my pots/pans (including handles), cookie sheets, roasting pan, Vent-A-Hood insert, refrigerator bins & half-shelves, etc. I don't need a single bowl sink! (That 3' wide shelf wouldn't fit in most single-bowl sinks either.)
Again, it's a personal preference and no one's preference is "better" or "more important" than everyone else's.
My sink:
Large bowl:
Small bowl:
Q