I am atheist, and a former Christian (Eastern Orthodox). I will echo what dolphinboy said - Heaven is imaginary, so what it’s like depends on how people envision it, and different people have envisioned it in different ways.
Here is what I gathered about it from my Christian past. The New Testament doesn’t give us very specific information about what Heaven is like (as I recall, it gives more details about Hell, but perhaps I’m a bit rusty on my New Testament, which at one time I continuously re-read from cover to cover). Generally, it refers to “eternal life”, and there’s a few references to a couple of random things about it like a “third heaven” mentioned by St. Paul, or Jesus’ assertion that in Heaven, people do not marry nor are given in marriage, but are like angels (i.e., chaste), but as I recall, nothing approaching a detailed explanation of what the place is like.
Standard Orthodox theology teaches that Heaven (or Paradise) is more of a state than a place, and that its essence lies in experiencing God and his grace close-up. The blessed are typically described as enjoying the presence of God and constantly giving him praise. Some sources suggest that Heaven and Hell are, in a funny way, kind of the same thing. According to this theory, while those who love God will experience his presence as a blessing, unrepentant sinners who don’t care for God will experience his presence and love like a burning fire, thus suffering by the very thing that will be giving the souls of the blessed saved ones bliss. Another Orthodox teaching is that the ultimate Paradise and Hell will come after the final judgment, when souls will be reunited with their resurrected bodies, and that what the souls of the dead experience until then is a mere foretaste of Heaven and Hell.
Same here. I came away from religion with the impression that Heaven as conceived by the Orthodox Church is really not a very interesting place. It’s not somewhere where all your wishes come true and you have a lot of fun and enjoyment of the type we have on Earth, but a place / state where the principal, if not sole benefit is being in God’s presence. A way to gauge your readiness for Heaven is how you respond to attending church. This has been described as “a miniature Heaven”. Basically, if you’re just going to mass to check off a box and don’t participate fully and actively in the service and feel bored there, including preparing for - and when appropriate taking - Holy Communion, you’re kind of wasting your time there and are probably not ready to experience Paradise. In my religious days, I was generally bored in church (as I’m sure lots of people are), found the 1 1/2-to 2-hour service burdensome, and was happy when it ended. I have heard something similar on a Youtube channel run by Brother Casey, a young American Catholic monk / friar in a video where he talks about the proper attitude for being in church, where he explicitly says something to the effect that if someone is bored in church, why would he want to go to Heaven? (I would ask Brother Casey about the elephant in the room: wouldn’t they want to go to Heaven so as not to end up in Hell? Is that factor not on your radar? So if someone fails to find going to church fulfilling, does that mean they will go to Hell and suffer eternally, even if they dutifully went to church while alive?)
This meme really hits the nail on the head - it’s a very succinct summary of why I’m glad there’s no evidence of a god and why it feels great to be unburdened of belief in “him”, as well as of belief in an afterlife.
One hell of a kitty there, btw.
I think this is very much a pop culture stereotype - and caricature - of Heaven, and is often used for comic effect. It’s likely not quite how early Christianity envisioned it; it basically conflates the souls of the departed with a stereotyped image of angels. As a kid, this kind of caricature confused me and, quite frankly, spooked me. Bird wings IMHO do not belong on humans or humanoids. At the age of about seven, I would see these old cartoons where a character would literally be killed and this would be signified by them ascending to Heaven with wings, a halo, and a harp (e.g. Tom in the 1944 Tom and Jerry short “Mouse Trouble”), or simply becoming a ghost (e.g. in the 1967 The Inspector short “Le Quiet Squad” - in this case 9 ghosts representing the shot cat’s 9 lives). Around that time, I had just recently come to terms with the depressing notion that everyone without exception was supposed to die one day, and this cartoonish representation of an afterlife - and its attempt to make death into something humorous - both confused me and unsettled me (life after death? WTF?) Even today, I feel much more uncomfortable when I run into a caricatural image of a cartoon character flying off to heaven with angel wings than when I see a photograph of an actual real-life dead body. Seriously.
Honestly, I’ve never really liked the idea of an afterlife. Even if it were to be one of bliss and completely preclude a Hell or whatever (and Hell is a very real Christian teaching and according to the so-called good news that the Gospels are claimed to be, a much easier place to end up in than Heaven), this whole idea of some kind of intangible soul being severed from one’s body and being sent away in incorporeal form to another realm where it will be separated from those that remain on Earth has never been an appealing concept to me. As far as I’m concerned, if you’re going to be dead, better be dead for real, completely and truly. Dead in both body and soul, no ifs or but about it. No disembodied consciousness surviving separate from the body or anything like that. The transient life we are given is the one we have, and I think it’s better to make the most of that life and live for that life than to try to find meaning in anticipation of a life after death.