Well, let’s see:
1. I don’t believe this concept of God that I developed as a child and never bothered to develop further.
The Catholic Church has a different conception of God than as singular, omnipotent and omniscient? The Catholic Church does not teach that Jesus is that God?
I spent 20 years mostly as an adult working very hard to reconcile my actual experience with monotheistic and most specifically Christian beliefs. This was done in several different denominations, from the extreme Calvinism of my youth, through association with Pentecostal/Evanglelical movements (because of family) into a very deliberate choice of the Episcopal Church. It involved very in-depth study, independently and with groups, including for lay ministry in the Episcopal Church. Even after I realized that I could no longer honestly call myself Christian despite all the theological gymnastics in which I had engaged, I studied Reform Judaism with a rabbi for an extended period of time, trying to remain within monotheism.
The decision to leave Christianity and monotheism was not one that I made lightly or on the spur of the moment, but in light of personal religious experience. It was certainly not the easiest path or choice. The path of least resistance would have been to remain at least nominally Christian in order to fit in with my family and my broader society. It would not have been an honest choice.
2. I want to do what I want to do.
Hardly. My religion often calls me to make decisions that are not following the easiest path or what I would like to do. Instead it calls me to behave responsibly, with wisdom, moderation and respect for others and the effects of my actions upon them.
3. God’s commandments aren’t the way I would have written them, so they must be wrong.
4. God doesn’t meet my expectations, so I’ll ignor him and invent my own.
Why should you be surprised that there are people who do not agree with your understanding of deity when there are billions of people whose understanding of deity with which you do not agree?
Orthodox Jews could say the same about Christians when it comes to God’s commandments not being the way Christians would have written them, so they must not apply anymore.
**5. I want to have sex with whomever I want, whenever I want, wherever I want, however I want. **
Well, let’s see. I am a monogamous heterosexual woman who has never had sex with anyone other than her husband. I was a virgin until I entered into committed relationship with him when I was 30 (we had a handfasting–a binding religious wedding-- before we had our legal wedding). I have one very desired child and had one very medically difficult miscarriage before her. We practiced birth control until we felt we were at a point where we could responsibly take care of a child, emotionally, physically and financially. After her birth, it was not medically advisable that I become pregnant again, so my husband opted for a vasectomy as it seemed the most responsible course for me to do what I could to stay around and raise the child that I had rather than risk death in attempting to have another one. That hardly seems to meet your description of sexual hedonism and free-for-all.