It doesn't matter if you only have one of each print, what matters more is how the fabric 'reads'. A lot of patterns call for dark, medium or light, so separate into three bags/boxes to begin with. If you find that your stash of squares is growing you might want to separate into colours as well.
Others have suggested quilt patterns you might like and a search for 2 1/2" square quilts on Pinterest will give you more quilts than you could make in a lifetime. Be careful though, this can become addictive.
