You being the expert on what's in "Heck"...? ;)
Heaven is...paradise. Perfection. It's the pure presence of God, pure love and sense of belonging and joy. Total connection with...everyone there, with God. Complete knowledge and understanding, and no more fear or sadness. With that, I don't think anyone would feel the need for anything else....because you'll have...everything! Everything good! Nothing bad! This includes no boredom! No selfishness, either; it's all about God, and that will finally be what those there look upon, not themselves. Pure and absolute goodness flowing from everything!
"Heck," I imagine, is the absolute opposite; the total absense of all those things present in Heaven. Not to mention pain of all sorts, which, with the absence of all those aforementioned things, is pretty much automatic.