Love, love the Postmarks set. As you see from the above play session, I went with greys and blues.
The 'post' is from Postmarks, minus the 'card'. The blue highlighting outline is from Label basics stamped on the reverse side. The 'birthday' is from Giga guidelines. And the background is a Tim Holtz stamp, repeatedly stamped off. Lots of sponging around the edges, first in grey, then black.
I used markers to colour in the wings. And not many embellishments as fitting for a masculine card.
Supplies; Stamps - Postmarks, Labels basics, Giga guidelines, Tim Holtz twiggy background, Paper - white, kraft, Other - postage stamp die.