tons of similarities in the stories. i have seen most, if not all episodes.

always:

"not your time, must go back"

"i don't want to go back, i want to stay"

"there was this light, and it drew me to it"

"i saw myself floating above my body, and at first i didn't realize it was me"

"i saw a figure coming toward me"

"i felt total peace and total love"