Most weddings these days have a very wide range of age groups, which mean the wedding music style is going to vary from decades and genre, most songs today have a deep base to them as opposed to a song form the 60’s.  One thing you may want to consider is what the average age range is at your wedding and cater to their style if you want a majority of your guests dancing during the night.  Remember most of your older guests may be from out of town and just want to sit and catch up with family and friends while the younger generation is ready to get their dance groove on.  When creating your song list just consider who you plan to have on the dance floor with you.