Hey look, another morphyx!
I choose not to believe in Jesus because there is not a shred of evidence that he ever existed. I will agree that there are some short sections of the Bible that have been found to contain truthful information about the ancient world, mostly from the Old Testament... but more than 90% of it is lacking in evidence.
However, I'm not saying that I know for sure Jesus never existed.... no one does. Actually, I think there probably was a figure that Jesus was based on who lived sometime in the 1st century.... however, his story was most likely embellished to the point where it now bears little resemblance to the truth.