Welcome from the north. Lots of knowledge here, so you should get your question answered over and over.
If you're planning to use the clothes for quilt squares, I think I would try to match fabric types as much as possible so each quilt is fairly uniform. Also, I think you should look for the straight grain of the fabric and use it as one edge of your squares.
I've never made a clothing quilt but these are things I would do if making one.