CNC is a lot of fun if you and you’re partner are on the same page. My partner has a gun play kink (we don’t use real guns) and it has been great to explore as our relationship has grown.
My gf and I like sex slave roleplay. My biggest fantasy with it is to throw a party where she has to serve everyone wearing a sexy outfit. She'd be free use for anyone at the party, and it eventually ends up with her doing a blowbang/gangbang/bukkake.
Currently? Smooth talking my wife into a threesome, ideally a MFF that included her best friend but a close second would a MFM with a rando. The first one would be extremely difficult as the women in question are far too conservative for it. The 2nd may just be possible with enough work and the proper circumstances.
Watersports is my current fantasy. My wife and I are Polyamorous, and I just started seeing this girl who also has a pissing kink so I'm crossing my fingers that I'll get to explore that someday soon!