DW and I met 16 years ago and were married within 6 months. No kids - we met in our 40s and both childless by choice.
Met skiing and that remains a common passion, but also learned quite quickly that we both enjoyed sailing, and a few years back bought a small boat to indulge that interest. We've more recently also taken up kayaking together in the summer, and occasionally we'll get on our bikes and cycle the local country lanes - overall we're pretty active for a couple now in our late 50s.
She was from a hockey playing background, me from rugby - both too old to still be playing, but we share a general interest in sport (a few years back I asked what she wanted for her birthday and she said 'tickets to a cricket test match'). We do a lot of walking on the beach/in the woods with our dog.
Had overlapping tastes in music; I've learnt to enjoy most of what she likes, she tolerates some of my choices, though there are some things we each can't understand how the other can listen to (Celine Dion FFS, what's that sh*t about?). We have differences in our tastes in literature and film; she's into what I think of as 'girlie' stuff - Jane Austen, Brontes, Thomas Hardy and a pile of French stuff (she's fluent in the language), I'm more into escapist action/adventure tosh (I know it's mindless rubbish, but I enjoy not having to think too much sometimes).
Both enjoy popping to the pub for a beer or glass of wine after any of the skiing/ walking/sailing/kayaking/sailing, and love to eat out every couple of weeks
Both pretty political, with similar views overall, though we disagree about some issues and that leads to lively debate.
What do we talk about? Any and all of the above, but sometimes we just sit in front of the log fire and chill out (eh? 
OK, not quite, but you know what I mean) in silence - sometimes there's no need for words.