Nope. I just don't believe god exists. Just like I don't believe Allah exits or Bigfoot. They could but I have no good reasons to believe they do. Do you believe Allah exists?
Of course not, but that is getting off topic. So, you refuse to believe because of lack of evidence? Firstly, I should say that I am of a quite different persuasion than many of the Christians you have encountered. I believe that the Scriptures are very clear when they say that
1.) There is enough evidence in creation to know that a god exists. The fact that life exists period, and that the earth is the exact distance away from the sun to support life are no accident. The fact that every particle in our bodies is so unique and complex is enough for men to know [regardless of what they say or claim] that there is a god.
2.) That unless the Father decided to change your heart, there is no amount of persuasion or arguing that will change your heart, because as of currently you have a heart of stone-- set against God. Let me ask you this; if you don't believe there is sufficient evidence for a god, and any evidence given to you is not sufficient,
why join a Christian forum? What is the point in asking people for evidence when you refuse to believe it?
All I can do is pray that God will reach out and pour His grace upon you to change your heart to repent and believe in Him. But beyond that, I think that we both know that no amount of 'evidence' will ever be enough for you. God has chosen not to reveal Himself in the way you want Him to, ie. literally giving signs from Heaven, because faith is "The grounds of things which are hoped for, and the evidence of things which are not seen."
And sad but true you will never know Him, and never find the evidence you are looking for unless He first opens your eyes and changes your heart to see who He is.