These are three quilts I've made. The first is coffee themed for my SIL. The second is a Judy Neimeyer pattern I paper-pieced for my DH. The third was actually made for my DD but my DH loves it as much as she did.

I think it is more the colors that would make a quilt "manly" or "girly" rather than the pattern. Just use darker colors fabrics, outdoor themes or whatever he likes, and you can pretty much use any pattern that suits your fantasy. IMHO.

How about some variation of good old Turning Twenty? Simple to make, looks good, you can use a variety of fabrics he likes.