Muslim > Atheist > Christian
Well, I would say that I'm a lot happier since becoming a Christian. The Bible's been a great source of wisdom and Jesus is a great cornerstone in my life. I can't see myself going back to the other belief systems, because I'm just a big fan of Jesus and his teachings. Being an Atheist for a large part of my formative years always left me feeling like I was missing something in my life, and I think that in the UK there's a real aversion to faith in general, as religion is often seen as a negative thing. But, ever since I've become a Christian I feel as though new opportunities have opened for me in different areas of my life, and that through grace of God I've been able to overcome many challenges in my life, and see the world through a different lens.
It is hard as a lot of Churches here in the UK are quite cliquish, and there are not many people my age. But, whenever I'm feeling down, I always go to the Bible for some wisdom and guidance. For me it's about having a relationship with a loving creator, and trying to be Christ like, and so embodying those Biblical values, such as being compassionate, forgiving and loving towards other human beings.