I don't think spirtituality (or lack of) is something that one should be proud of. It's rather like being proud of the color of your hair.
I am an atheist, but it's not something I'm proud or shameful of. I may say disparaging things about religion, or certain dogma, but in the end, it's not a comment on the people that believe it. For example, I think scientology is a load of hooey, but that doesn't necessarily mean that all scientologists are gullible or stupid.
Whatever gets you further on your own path is fine. I may not agree with your path, but that's okay. I have my own.