>going to GM a Deathwatch one shot for my usual party
>none of them played it before so I offered making characters for them, two took me up on the offer
>one wants to play a techmarine (he plays mechanicum in KT) and the other an apothecary, but they don't really know that much about the universe beyond the basic premise they left the chapter selection to me
Got some funny ideas? At first I thought I'll just make the techmarine an Iron Hand and the apothecary a Blood Angel to just keep it simple, but I'm tempted with making some funny combinations like an impatient White Scars techmarine that wishes he was driving a land speeder rather than fortifying the position.