Proper singing.
By which I mean breathing in the right places and not stretching your neck up to reach the high notes and enunciating the words so that they can be heard properly and singing in your own accent (whether that be Liverpool or NY, I'm not fussy) and not BLOODY WHINING
ahem. sorry.
I get most of my exposure to "current" music from the Graham Norton show... it was when he had The Vamps on that I realised I was definitely a child of the eighties 
Basically you can't go wrong with a bit of Billy Joel, or Chris Rea, or Dire Straits and I joined in with "wooo-oh Livin on a Prayer" which was background music on a TV show someone else was watching in the next room
I liked Taylor Swift when she was on Strictly.
Basically I want to be able to hear the words and extemporise a harmony while dancing round the room. I'm not style specific (I discovered a liking for Glaswegian punk a few years ago, owing to obsessively googling my celebrity crush).
A lot of the time I listen to Bach...