Nothing.
I don’t usually get religious, but I hate the idea of Heaven/Hell. It implies there’s an ultimate being in the universe that cares about every living soul. It also implies that every bad person, no matter how bad, goes to burn in Hell for eternity.
There’s a few things wrong with this logic; namely everything. I mean, does a Tax Evader or Solicitor deserve to burn in the same place as someone like Stalin or Hitler? Obviously not.
Then there’s the whole God or “flying spaghetti monster” argument that aggravates me. If he really cared about everyone so much, why would our world be so unbearably corrupt, greedy and downright evil? Why wouldn’t he stop all of it?
To clarify, I don’t admonish anyone who would believe in Heaven/Hell or religion, but personally I can’t stand it. You’re all free to believe whatever.