I'm supposedly a Catholic, though I've grown fairly apathetic about organised religion over the past few years and now I don't really know where I stand any more. I do believe that our universe is a strange aul' one, as universes go, and that there could be a much larger picture, hidden just about but forever out of our sight. Maybe a God could be responsible for all the unlikely rules our lives have to follow, or maybe the rules themselves are a kind of God? Hmm, I hoped I wouldn't descend into rambling nonsensery within my first paragraph, sorry about that.

I suppose I'm agnostic, if I were to put a ribbon on it.
I used to believe really strongly when I was younger, but I got disillusioned over time. A few years ago, my brother decided that he'd prefer being a Protestant. My mum was horrified by this, having grown up with all kinds of horrible, bigoted notions about a denomination that has almost exactly the same set of beliefs as Catholicism. She all but disowned him for a few years, completely shattered his confidence and self-worth, and there was this awful, awful atmosphere that lingered whenever my brother and my mum were in the same room. It was just so horrible... and all because of something so petty! So, that changed my views about religion a lot. I just didn't feel the same about it at all, I lost all enthusiasm for going to mass and would pretend to sleep in so that I wouldn't have to go but wouldn't have to confront my parents about it either.
Even though I can get really frustrated with religion and the ways it inspires war, injustice, prejudice, phobia, and hate, and so on, I still think it's a valuable part of humanity. Fundamentally, religion represents and teaches the best of human intentions, that we should love and treat one another with respect. You can't really find fault with an idea like that, and people who follow it in a considerate, genuine way do make the world better. The basic message is a good one, but things can go horribly wrong when people misinterpret religious texts or use them to defend their intolerance. Intolerance works both ways, too... self-righteous, dogmatic atheists are just as bad as any other kind of extremist.
Studying physics for the past couple of years has given me a tiny idea of how little we currently know about the way stuff works, and how what we hope to learn is also, ultimately bounded. I don't believe we can ever prove or disprove the existence of a higher entity, much like how we can understand that matter gravitates towards itself but never understand why it's in Nature's nature to do so. So, I think everyone's entitled to their own beliefs provided they treat others' with as much respect. Decent, considerate people should never be ridiculed for their faith or lack thereof, and you can shove Russell's teapot up your universally extrinsic orifice if you think otherwise.
As for an afterlife, or stuffs like that, I have a couple of views. Some are conventional, and others involve crazy, parallel universe sort of stuff that I won't get into because it's incredibly, embarrassingly stupid.

Mostly I think that whatever happens, happens. Whatever existence has in store for us when we die is what awaits us, so, everything will be the way it should be. Death is sad and terrifying, but it could be kind of beautiful too, in a strange way.