Originally Posted by Prism99

I would recommend using a walking foot and making gentle curves all the way across. Start in the middle of one side and go all the way to the other side. Basically they are "waves" going across the quilt (or up and down, if you prefer). This is a very easy, forgiving, and modern method of quilting. Your quilt top looks quite modern already, so using modern meandering lines across it would be a good match in that respect. Plus, with a geometric quilt, it is nice to introduce some curving lines in the quilting. The lines do not have to be perfectly matched (in fact, they should not be).

Here's an example:
http://www.quiltmag.com/products/thi...an-meandering/
It's the wavy lines, although I would be more casual about them (more variations).