Good question indeed.
I think it's sorta like a dream world. Where it's a definitely more of a "feeling" world than a physical world. There is much beauty, think the goldest gold grass and the most beautiful green trees. The skies would be all shades of wonder, colors perhaps we've never even seen before would paint the landscape.
I think you will be able to travel as fast as thought and be with those you love.
I think you will be filled with warm and golden light.
Now of course if your heart is twisted and you were intent on evil during your life I think the image would be slightly different. Perhaps very cold, desolate, aloneness. Absence of light and feeling. But I don't think that it would be permanent. I think that eventually if you chose, you could leave that place and start over.
Years ago, when I was young, about age 13 right after my grandmother died, she came to me in a dream. She took me to a beautiful field, filled with tall grasses and we sat under the boughs of a mighty tree. She talked with me for awhile and told me that I would become very ill soon, but to not give up. That I had a choice to live or die and she wanted me so very much to live. I remember then telling her I loved her and then suddenly I was "sucked" back up over the tree, over the land into the sky ...like a string was being pulled from my waist. Poof- I woke up.
6 months later I became very ill and was hospitalized. Turns out I had rocky mountain spotted fever. Since the doctors almost did not catch it in time, and indeed it was by chance a doctor from out of state was visiting a room next to mine that they figured it out, I almost died. I was on the brink of the point of no return when they were able to get my blood test back from the CDC in ATL and give me the antidote.
So I do believe sincerely in what I've personally seen already. Perhaps it is different for everyone though. That I cannot know or presume to say.
What do you believe?