You're not the only software engineer I know who's in the Reserves. The way my colleague talks about it, it feels like more duty than hobby. What tips it toward hobby for you? Asking as someone who has been curious about joining in a reserve force or volunteer SAR organization.

I'm not sure if you mean a duty in a negative sense? Or in an obligation sense? I'm not obligated to do it and I'm sure they'd get by fine without me.

It's a hobby because it's challenging, social, physical, rewarding and just fun.

Go and see your local Reserve unit now if you are even remotely curious!