Religion is a very personal matter. You can choose to subscribe to any philosophy, and you can identify yourself as a part of a religion if you adhere to their core beliefs, even if you don't follow every part of the philosophy. Many people who identify themselves as Christians, Jews, etc. have some conflicting beliefs.
With that said, Deists generally believe that a supreme being created the universe. This belief is rooted in observation, logic, and reason, more than blind faith. Deists also believe that this Supreme Being does not interfere in our every day lives, because he has a plan that may not be altered. Typically, Deists reject the idea of miracles or prophecies and forms of organized religion. The argument could be made that, if you are open to the possibility of divine intervention, you are not a true Deist. This article, and others on this site, may help you with some of your questions:http://www.deism.com/deism_vs.htm
Christianity is the belief that Jesus is the Son of God who was sent to Earth to save us from our sins. You can be a Christian without attending a particular church, or subset. There a dozens of different offshoots of Christianity, each with their own fine-tuned belief systems. So, ultimately, it's up to you.