Dave,
You wrote: Would you like to read some things that have brought me to these conclusions?
I have read many such things before. Similarities do not prove influence. Jesus was a Jew. As such, He was greatly influenced by the Hebrew scriptures and the Jewish religion of His day. I believe that influence, along with the direct influence of God's Holy Spirit were his only spiritual influences.
It is, of course, possible that the influence of the Jewish religion which began some 1,500 years before Christ, and the influence of the religion of men such as Adam, Noah and Abraham which began thousands of years earlier than that, may have spread into eastern lands several thousands of years before Christ. It is also possible that, in ages long past, God revealed many of His truths to people in all parts of the earth who never came into contact with people living in the "Bible lands." (The story of Job, for instance, comes to mind. The Bible calls him, "The greatest man among all the people of the East." It also tells us that he lived in "the land of Uz." But Bible scholars have no real idea where that was.)
I am, however, convinced that God has revealed His greatest truths only through the person and work of Jesus Christ.
You asked: Are you saying that all religions teach good and moral things?
For the most part, certainly. I know few Christians who would say otherwise.
You wrote: If so, why did you choose Christianity? Geographical location? Familiarity with basic concept?
Those things certainly facilitated my conversion. But I refused to believe the Bible was the word of God until a thorough study of science and history convinced me that it was.