I like the look of tone on tones better than straight solids...personal preference. Besides, they hide the boo-boos so much better! LOL! Think that may be the real reason I like them so much.
I've discovered that I also like the prints that read more as solid for most things. However there's nothing like the the big vibrant color prints for kaleidoscope type quilts. Have one in progress sitting in it's stack of paper plates waiting to be stitched together when I get done with the other projects that have 'due dates' on 'em. Seems like those push the ones we do just for fun farther and farther back on the back burner.