When choosing a DJ for your Wedding, Music should be the least of your worries. Every great DJ has a large selection of music or the ability to get it for you. There are many moments during your Ceremony and Reception that would be great to have a certain song played. From the moment your guests arrive to the last song of the evening, I found a great website that have awesome suggestions for these key moments.
Experienced DJ companies will provide you with a top requested list to pick your favorites as well as ask you what songs you would like to add. Every Bride and Groom should be able to choose the music that is played at their wedding. With help from your DJ, you can provide general genres, make a specific list, or a combination of both. The DJ should not play what they want to hear, but what you want played. A good DJ also has the ability to "read the crowd" by looking at your guests and know what to play to keep them dancing while still keeping your music requests in the mix.
There are a lot of wedding websites that will advise you NOT to play the "cheesy" interactive dances. Such as The Electric Slide, Y.M.C.A, Hokey Pokey, Chicken Dance, Conga Line, etc. It really comes down to what you want at your wedding. Many of these dances can help get the party started and keep your guests entertained. They will more then likely stay longer and have a lot of fun. There are also ways to keep your guests involved using classy music does not come across as "cheesy". Ask your DJ how they can get everyone involved. You may want simple elegance in your music or upbeat & fun entertainment, but either way, the music you choose should reflect you and your fiancé.