Emily, I agree with the others. I think it would be a nice scrappy quilt. You will need something to give it some cohesion though, so I would use one fabric for all the background, like Gayle said. Or always use the same color for the triangles, etc. Keeping the same value, like others said is a must. I have also read that you should try to use a fabric at least three times in a scrap quilt~I guess it keeps it from being too random. But, I do not think the quilt police will be knocking on your door and counting!!
Anyway~be sure to post pics~this will be fun to watch!!