I have picked a theme... yes indeed.
It'll mostly be based on combining a Colt .45 Revolver with a classic chopper frame. It might seem like a random choice but I have a feeling that this idea came from playing a bit too much Red Dead Redemption in the summer.
Who knows... a few other western elements might pop up in the designs. But I think that's quite likely as I've already got a few things in mind.