Anyways, since apparently Amir said the Riddle shouldn't require "assumptions," I'll expand on my answer (which was simply the most simplified form) and remove all required assumptions:
What door, from the understanding that Heaven matches truth-telling and Hell matches lying, matches your attribute of either always telling the truth verses your attribute of always lying?
There, I solved it and can get to Heaven with a 100% success rate, better than Tolli's coinflip.
Edit: Grammer