I won't make them listen to anything. What am I, some kind of brain washer? O no, never, they can find out their own musical tastes.
Now of course I will still listen to my own music even with children around. Jazz (Frank Sinatra, Miles Davis, Freddy Hubbard, John Coltrane, even Micheal Bublé), blues (B.B. King, Buddy Guy, Stevie Ray Vaughan) and lots of rock (classical, alternative, regular, everything from Nine Inch Nails to Pink Floyd to Rush to Queen to Led Zeppelin to Jimmy Hendrix to CCR to The Beatles to Muse and I can go on like that for a while) and a quite tad of various other genres (classical, plenty of movie/game soundtracks, kodo, even a bit of electronica) will be heard quite often in my household.
If they end up liking that as well, that's fine. If they don't, well, too bad. They're not clones of me you know. I just hope they don't end up liking...*shiver* hip-hop.