My pastor once described it as a place where everyone is doing what he was made to do, serving and helping each other and doing the kind of things we like to do.
As a lad, I was told that you go to Heaven to be with God. I was also told that we went to church to be with God. Therefore, I imagined Heaven as being eternal church. Which didn’t exactly fill me with eagerness to get there…
If we knew, we couldn’t tell you.
If we could tell you, you couldn’t understand.
Which is a fancy way of saying that any heaven that’s worth anything would have to be beyond our current comprehension.
Heaven is like Pittsbugh, only more so.
I can’t comprehend it, but I’ll say this:
I think a lot of people are going to be surprised by who’s there and who ain’t.
I read in an anthropology text that most cultures conceive of heaven as an immensely pleasant place, but that because our Judeo/Christian culture conceives of pleasure as sinful it would be hard to imagine what goes on there.
Heaven is a place, a place where nothing, nothing ever happens – Talking Heads
I pretty much go with the Presbyterian ideal of being eternally in the presence of God. I have no idea what form this will take, however.
It seems to me that for anyplace to qualify for “Heaven”, it has to have everything that you want whatever that means for each individual.
Therefore, my Heaven would have beer. Lots of icy cold beer, maybe an endless summer day (no bugs) on a dock on a sparkling lake with um, beer. 
That was another comparison Twain made in “Letters From Earth”. Satan wondered why people who, at most, spend an hour a week singing hymns to God would want to do exactly that for eternity.
Whenever I’m the target of witnessing, I mention Rick Derringer’s “Rock & Roll Hootchie Koo”. It’s not a great song, I tell them, but if it’s not going to be available in heaven (even on 8-track) because it’s “earthly”, or because it doesn’t “glorify God”, then I’m not interested. I’d imagine after a few thousand millenia I’d be desperate to hear that song. And if it’s a case where I’d be too “happy” to even remember it, then it’s no different than brainwashing.
Heaven: the eternal ennui --Larry Gott
Geezer