I'm a Church of England christian, which a Hindu colleague described as "cop out christianity for those who aren't really convinced" . Which, in my experience, is a bit harsh; there are loads of christians in the CofE who are pretty convinced and who are doing everything but copping out - so many of the excellent social iniatives round here that are transforming the poorest people's lives are organised and run by christians.
Anyway! I'm a (very passionate) christian because I truly and completely believe in God the creator of the world, and in Jesus the saviour of the world, and in the Holy Spirit alive in the world and transforming lives. That conviction works on lots of levels - I'm as intellectually convinced as it's possible to be that this framework for understanding the world is consistent, makes sense within itself and makes sense of the world. I could say much more about this...!
On another level I feel God's presence in a way that convinces me that it is not just me going bonkers / hallucinating; God's presence in my life andin the lives of others goes way higher and deeper and broader than I ever could. And so often when I'm complteely incapable of doing something on my own, I find that after praying I suddenly as able to do the thing that was impossible before (not Superman stuff, just things like knowing what to say to someone in great suffering or complex situation, you know, or having the perspective on my own life that I need to cope with its many demands - sometimes I feel so overwhelmed by all the demands of my life and then I pray and suddenly I have a way forward, I know what to prioritise, or sometime help comes unexpectedly from someone else).
I also believe in big answers to prayer like physical healing, although I must be honest and say I haven't ever experienced much of this and I recognise that we all die sooner or later anyway so all physical healing is provisional. But I do know people who have experienced pretty miraculous answers to prayer.
so what my faith gives me is a way of looking at the world (and myself, ,my own heart and mind) that is all about recognising the realities of it, engaging with those realities and bringing about real transformation. I know a christian who became a police officer and suddenly all that christian doctrine of sin became so real, because the effects of brokenness were so obvious when you take your umpteenth call from the same woman who is being physically abused or the same people who are stuck in a lifestyle of sin / crime that they can't get out of. So it's only by the life-changing power of God's love that any real lasting change can happen and we see the fruits of that in the UK as well - so much of what is best about the UK is built on christian principles by christian people who truly believed that by prayer, through God's love they could change things, having been changed themselves. And that's still happening - there are still christians getting stuck into all levels of society working and praying for change (as well as all the stupid stuff that christians can get distracted by).
As I said I am a very passionate christian and I could go on and on and on and on and on...!