Does your son and fiance have interests that you could incorporate into the quilt with fabric?
My youngest son is a musician, currently in his second year of college..going thru' for music teacher, his lady is is a sound board engineer. Cory is also keen on all things Japanese....he spent a year in Japan and is quite fluent. I have been stockpiling fabrics that are either music or oriental themed. So...no matter what pattern I make, the fabrics will suit them both.
Let us know what you come up with!!!
Patti