First, I have been a Christian since 1964. I was not an 'active' Christian from 1966 to 1985. Long story. I have been a Bible teacher since 1988.
1. Since 1985, I have been going to church quite regularly and am very active in my church, involved in projects, maintenance, choir, trios/quartets, serving on various committees, teaching, working with a local charter of an international children's ministry (see www.awana.org ).
2. When I was young, if someone was pointed out to be a Christian, he/she was seen as a respectable person and someone to be looked up to and trusted. Now, Christians are mocked, made fun of, teased, shunned, unpopular, looked down on as a bit nutty, etc. In many instances a Christian's faith is not permitted to be freely expressed outside their church body. It might 'offend' someone. Well, THAT offends ME, but since the minority seems to rule today...we are seen as the 'bad guy.'
3. The youth have always been a problem area in churches....in that there hasn't been much of a draw for teens, and the younger people (18-25, single). The teen years are when many teens who have professed faith in Christ tend to drift away. They (as well as I did) are trying new things, experiencing different ways to see life, etc. That was true when I was a teen in the 60's, as well as today.