Baptised Catholic but never attended church until I started dating my wife and then went through all the sacrements in 6 months so we could get married in the church. Attended off and on till about five years ago at which time we went to a Methodist church with friends. We now go to church every week and are very involved as I sing in the Choir and help with musicals and plays and my wife serves on the Trustee committee. We decided to switch because we fundamentally did not agree with many points of the Catholic doctrine.
As we were deciding to change I spoke with our priest and did a lot of research on the beliefs and customs of the church and came to the conclusion that much of it was driven by the leaders of the church, circumstance and tradition as opposed to actual biblical facts. So in the end I did not feel as bad leaving.
1. Contraception/ Homosexuality. Believe it or not in the Catholic way of thinking these two issues are related. While Romans says that men laying with men is a sin and an abomination the Catholic church also points out that the "spilling of the seed" is a sin. In other words sex leading to ejaculation that has no chance of bringing new life into the world is a sin. I don't remember the exact biblical reference but someone was told to lay with his brothers wife and while reluctant to do so did but did not finish the act and spilled the seed. For doing so he was punished by God. Therefore if we take this reasoning to its logical conclusion then any sexual act where the married participants are aware that conception will not occur is a sin. So that means older couples who because of natural conditions can't have kids, then they can't have sex. Using even the "rythem method" when the woman knows she is not fertile is a sin. ************ is a sin, any birth control, a sin. The list goes on. This is the root of the Catholic belief that contraception is a sin.
2. No Married Priests. In the beginning of the church priests were in fact allowed to be married. Study Catholic history and you will find many were married long ago. The primary reason the church decided against them getting married was self serving. Since in the early church many of the parishes buildings and land were titled to the local priest there were numerous incidents where upon the priests death local custom allowed that all the deceased's assets were given to the first born male son. This meant assets the Church (Rome) felt belonged to them were being lost to the heirs of the married priests. They chose to stop that by merely passing a new rule in the church that said priests can't get married. No biblical reason merely financial reasons. If that decision was so arbitrary then why can't they make another arbitrary decision to let women become priests?
3. You should never take communion unless you are truley repentent, clean of heart, and have confessed your sins to God, (through a priest of course). Every Sunday we attended mass almost everyone took communion however confession at our parish was for a 45 minute period on Saturday afternoon with usually only one priest hearing confession. Our Parish lists over 4,000 members. You do the math.
4. Catholic tradition is such that over the years since its inception the church preached to the masses that long ago were very illiterate and quite frankly printing had not been invented so each week at mass the priest read parts of the bible to the people and then told them what it meant. No bible study classes, no Sunday school just come on in sit right down and let me tell you what to think. Fast forward 14 or 15 millienium to the year 2000. Come right in sit right down and let me tell you what the bible says. Still no Sunday school (except CCE for the kids) no bible study. The church will tell you what to think.
After considering all these issues and visiting other churches we made the choice to change. I could have stayed and pressed for change in the church but it would have been a life time battle and I would have lost. I also understand that my parrish was not necessarily representative of all Catholic churches but similar to most in my area. So we chose to go elsewhere and it has honestly brought both myself and my family much closer to God than ever before.