The choice is entirely yours. Think about how you would like it to finish or make two blocks and see which you prefer. No matter what the "quilt police" think I believe quilting has no real rules but is a great place to experiment.
Even if you make a couple of blocks then don't like them you can always add a few borders and make a lap quilt which the local nursing home will appreciate. Another idea is to make a dog quilt. I made one for a friend's dog and did a different technique in each block. Things I'd been wanting to try and a few ideas of my own. I had so much fun with that little quilt.
Also look at Quiltville, Bonnie does some spectacular scrappies. Just have fun.