So far, here's what I've got:
1. Skateboarding. In space, doing anything but skateboarding is a crime.
2. Pizza. In space, everyone eats only pizza. Only, instead of being shaped like a circle, it's shaped like a sphere.
3. White Wine. People don't only drink white wine in space, but wine makes you feel a little floaty, so that kind of counts.
4. Sideburns. I think it helps with piloting or meeting aliens or something.
5. Futhark Runes. It's Bifrost-related, I've decided.
6. David Bowie music. Self-explanatory.
Please let me more about how to make life like spaceships.
(P.S. No pseudoscience.)