1 June 2016 Last updated at 07:33 BST
He says his highlight on the International Space Station is the spacewalk he carried out and the moment he stepped into space, describing it as amazing.
On his return to Earth, he says the first meal he'd like to eat is pizza.
But although he's returning to Earth in less than three weeks, Tim says there's still a lot of work to do on the ISS and science experiments to complete.
Peake became the first British astronaut on the International Space Station when he launched into space in December.

President Robert Mugabe and his wife arrived back in Harare early on Sunday.
Mrs Mugabe, 52, is accused of assaulting model Gabriella Engels a week ago at a Johannesburg hotel where her sons were staying.
She has not commented publicly on the case.
A lawyer for Ms Engels told the BBC that they were planning to challenge the immunity decision in court.
Willie Spies said he would argue that the first lady should not have been given special treatment as she had been in South Africa on private business.
The South African government's decision came in a notice from International Relations Minister Maite Nkoana-Mashabane, published in the Government Gazette on Sunday.
"I hereby recognise the immunities and privileges of the First Lady of the Republic of Zimbabwe, Dr Grace Mugabe," she said.
On Saturday, Mrs Mugabe had been due to take part in the first ladies' programme at the Southern African Development Community heads of state summit in Pretoria, which Mr Mugabe, 93, was attending.
However, she failed to show up.
South African police had said they wanted to interview Mrs Mugabe and had set up a "red alert" at the borders to try to ensure she did not leave the country.
But Zimbabwe's ZBC state broadcaster reported that President Mugabe and his wife "arrived on board an Air Zimbabwe flight early on Sunday morning".
It showed pictures of her greeting officials at Harare airport.
Ms Engels' lawyers have said their client was offered money to drop the case but she refused.
She appeared at a press conference on Thursday with a large plaster on her forehead. She has alleged that Mrs Mugabe beat her with an extension cable at the hotel where the model was staying with Mrs Mugabe's two sons.
She told the BBC: "She hit me with the plug and the extension cord. And I just remember being curled down on the floor with blood rushing down my face and down my neck."
The South African Broadcasting Corporation said the Mugabes were scheduled to attend a funeral for a state minister at Harare's Heroes Acre on Sunday.

Heard, 30, filed for divorce in Los Angeles Superior Court citing irreconcilable differences.
They married 15 months ago and have no children.
They have recently been embroiled in a legal case in Australia after Heard took two dogs into the country illegally. She pleaded guilty in April to a charge of falsifying documents.
Depp, 52, and Heard met while co-starring in the 2011 film The Rum Diary.
In the court papers, Texan-born Heard listed the separation date as Sunday.
Celebrity news website TMZ reported that Depp had asked a judge to reject Heard's claim for spousal support.
The split comes days after the death of Depp's mother. His latest film, Alice Through the Looking Glass, is due to be released on Friday.
The Australian court case started last year when Heard brought two dogs into the country where her husband was filming the latest movie in the Pirates of the Caribbean series.
When the case was settled, the couple released a video apology expressing remorse and advising travellers to respect Australian quarantine laws.
However, Australia's Deputy PM Barnaby Joyce had threatened to have the dogs put down, triggering a war of words with Depp that lasted for months.
The actor recently said on a US TV show that Mr Joyce looks "somehow inbred with a tomato".
Mr Joyce responded by saying he was "pulling strings" in Johnny Depp's head, like film villain Hannibal Lecter.
British astronaut Tim Peake has been talking about his return to Earth, as his mission in space nears the end.
[NEXT_CONCEPT]
South Africa has granted diplomatic immunity to Zimbabwean First Lady Grace Mugabe, allowing her to leave the country without answering questions about an assault allegation.
[NEXT_CONCEPT]
Film star Johnny Depp and his actress wife Amber Heard are to divorce, US court documents have revealed.