I've also had this urge to make my own patterns (See a few I have for sale at my Etsy shop.)
This one I made for Joe since we've both been longtime fans:
And this one I made as a birthday present for a friend:
If I ever make this one again, I may line up the text and images horizontally, rather than stacking the 'I' and heart.
Brought some graph paper home from work this week, so I'm off to conjure up more patterns!