I think my biggest issue is that most of the people I know feel that if you don't believe in "God" in the general Christian sense (i.e., A singular god -- with or without a son, depending on whether you're jewish) you're going to hell. Well, last I checked, Christianity isn't even the dominant religion on the planet -- it's Hinduism.
I can't believe that a god that's purported to be so nice and whatnot is going to send the majority of people on this planet to hell for not believing in him; and on the flip side, what makes Christianity right and Hinduism wrong? Maybe all the Christians are gonna get slapped around by one of the Hindu gods like Shiva when they die.