For lonely people in search of community, I should think the appeal of the megachurches' built-in social structures would be rather strong. On the other hand, I've been told that the expectation to fully commit to these groups is strong, and that non-conformity is not always well tolerated. My own sister, who left Catholicism when she married a Presbyterian, said the one thing she misses most about the Catholic Church is the fact that people leave you alone when you enter a church out of respect. She likes the fact that you can go into any church, say a quiet prayer, and no one will hassle you and begin accosting you with personal questions. In a word, Catholics let you be. Evangelical megachurches won't leave you alone. That would be a deal-breaker for me, never mind the bad theology, the bad politics, the bad art, the bad music, the bad worship services, the bad preaching or the bad hair!