The flipside to Fr. Mike's question below, "Why Do Catholics Become Evangelicals?" is "Why do Catholics Remain Catholic?" This is a particularly important question in light of the evangelistic identity of the Church. How, indeed, is Christ experienced in the Church? One of the beautiful things about Catholicism is the reality of unity in diversity--all of the myriad ways in which Christ offers Himself to His people.
Here's a YouTube video made by a youth minister for her Confirmation class. It pretty much sums it up for me: