I would lay it out on a design wall (or bed, or floor), and see how it looks. If you like it, go for it!
When I make scrappy quilts, I like to group the colours to make it a bit more cohesive. I searched for Cobblestone quilts, but there are a lot of different patterns by that name, so I'm not sure what yours is like. If the pieces are assembled into blocks, try making each block out of different fabrics in the same colour.
I like the the look of different types of print (civil war, modern,etc) together in the same quilt. Don't let other people's quilts deter you from making your own!