There are over 30,000 denominations of Christianity alone. Hundreds of thousands of other religions. As an atheist I assume the negative stance in a debate. It is the role of the affirmative stance to prove their claims. Will their evidence meet the burden of proof? So, in answer to your question I'll debate any topic on religion I find interesting. I prefer debates that are as, I just told another person, good natured and thought provoking. I am not static. My mind can be changed. I look to the affirmative to present the evidence for their claim. Whatever that may be. Using the best methodologies, we currently have for determining the truth value of claims, I contrast my beliefs with others. I may change some of my beliefs or the beliefs of others in the process. I may not. All I ask is that all parties including myself are intellectually honest. I hope this answers your question.