I think Salamanders would be great, and on that note I'd like to participate in this. I've got a few ideas bouncing around in the ol' noggin. Although, my understanding of the lore is somewhat lacking. Foremost, what age do the Adeptus Astartes typically recruit from? It sounds like they'd be teenagers or young adults, but from what I do know of 40K I wouldn't be surprised if they're selected from birth or grown out of a vat or something.