One thing. Religion as of now is the least important thing to me, it isn't really a big priority. But I've thought of my ideas and a way I think life after death works. -Where you go in the afterlife works on the Karma system, not on "What is sin, what isn't sin" -a version of heaven and hell, like Hitler went to hell, Gandhi and Martin Luther King Jr. went to heaven regardless of religion -Depending on just how good (Or bad) you were to people in your life, there is reincarnation, but after some time, give you some time to relax. Because, to be honest, heaven for the rest of eternity sounds like it'd get boring after a while. -Your happiness is what is important, the material things you may own should hold little or no meaning to you. Nirvana, etc. The majority of this sounds like Buddhism, but parts sound Christian... so what does this make me?
Your religion is what you choose it to be. Freedom of religion, you know? What you describe seems a lot like Mahayana Buddhism, though.
Yep, that would be Mahayana Buddhism although you're missing some chunks. Bare in mind religion doesn't choose you, you choose it!