The Briton has had to leave behind unparallelled views and the sensation of floating weightlessly in space.
And he faces a long, hard road of physical readjustment to gravity's pull, rebuilding lost muscle.
But there are perks to being back home, Peake said in webcast comments at the European Astronaut Centre in Cologne, Germany, on his third day back from the international orbiter.
"Using the loo, gravity is your friend. That's one of the things we do look forward to", he laughed.
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Other things he had longed for, the 44-year-old space traveller said, were Earthly smells, fresh air, and rain.
"The rain, it's something that you don't feel up there... any weather down here whatsoever feels unique and it feels very special."
Peake, the first British astronaut on the ISS, returned Saturday with Russia's Yuri Malenchenko and NASA's Tim Kopra.
Life in space took some getting used to, he recalled.
"It's the first thing you do onboard the space station, you make it normal," said Peake.
Towards the end of his tenure, the dreams started becoming a bit "weird".
"You're on Earth but you're floating around in buildings and you're clearly in zero gravity... It gets a bit messed up," the astronaut recounted.
Favourite moments included witnessing the Milky Way from an unbeatable vantage point, photographing Egypt's pyramids, and observing the spectacle of an Earthly thunderstorm from an altitude of some 400 kilometres (250 miles).
Saturday's three-hour descent in a Russian Soyuz capsule was another highlight.