Not to take it back to 2010 but the johndave fic where Dave’s a deep space astronaut who keeps taking missions because he feels like he’s waiting for something, wherein every 3 years he spends in space is like 10+ on Earth, and where he ultimately ends up hooking up with (& marrying? I think? I don’t actually remember a lot of this) Rose’s adoptive son John who was born and grew up while Dave was in space—is such an interesting & clever story conceit and one that I still think about.