My dad played in a jazz band all through high school and college (they came out of retirement to play at my wedding, lol!), so he raised me to love and appreciate "his" music! I have a lot of faves - hard to choose! Frank, Dean, Mel Torme, Ella Fitzgerald, Louis Jordan, Nina Simone, Harry Belafonte, and Joe Williams. A few of them I was able to see in concert...
My father's favorite was always Sinatra, but my favorite was probably Joe Williams, or maybe Harry Belafonte or Mel Torme. I can't pick!