A subject that I like to discuss is well stated in the blog below. Personally, I have swung between all contemporary to no contemporary music just because of my personal preferences and lack of maturity. At the end of the day, the music style is really a moot point - the lyrics and style should be Christ-focused, the congregation be unified and uplifted as they truly worship and visitors be drawn to the love, joy and unity of the body of Christ, I have seen those truths clearly in both off-tune versus professional quality performances, the most contemporary rap/hip-hop versus southern-gospel banjo hymns, acappella versus full orchestra, and at the end of the day - it's all about the heart(s).
http://worshipleader.com/culture/why-should-i-play-music-that-old-people-like/