When it comes to weddings, anniversaries and other family celebrations, it is common to have a wide mix of ages and genre preferences in the room. The DJ knows how to scan the room and can see where there are people wanting to dance, but may not if all they hear are the top Hip-Hop hits of the day.
Tell your DJ what you like and what you don't like and then ask him if he thinks your suggestions are good for your celebration.
Trust your DJ and give him your blessing to look out for and to take care of all your guests. He already knows how to keep the energy going. Tell him you want all of your guests to enjoy the music and to play something for everyone to enjoy.