Hehe, well his parents say that to us and think we’re still kids because of our hobbies. Which is amusing as we’re both very mature and always have been (especially me since I’m the eldest of 6). I’m doing a PhD with industry sponsorship and he’s almost finished his MBBS, so yeh, kids we ain’t.
He’s lovely - he mainly likes violent games (FPS’s) but I also like my RPG and action-adventure games so he’s learnt to appreciate them for me. We take turns to complete one-player games, it turns into a competition to see who can do the hard parts 
He also carries my camera and lenses around when we go out 
so I can keep up with that hobby of mine too.
I’m not a huge fan of strategy, I played some strat games. But I can easily spend 12 hours on a RPG or any game really as I* have *to complete them.