The winger has just completed a difficult loan with Brighton, though insists he has no regrets.
He told Mundo Deportivo: "It's a very intense, super demanding championship. Any team can beat you in every match. I learned many things from both my teammates and from the club. It was the first time I left Spain and it was a very nice experience. I found the Premier League very interesting because it is one of the best leagues in the world.
"Playing in a championship like the Premier League makes you improve from every point of view. It's a very demanding and physical championship, I met new people and with them new ways of working. I took away many lessons."
On Barca, Fati added: "Since I arrived here, when I was 10 years old, my dream has been to be able to fulfill myself at Barça. These last few years haven't been easy, but it's part of football. I'm 21 years old and I have to continue to grow, but I have the hope of being able to reciprocate all the love I receive from the culés.
"Every day on the street I meet people who encourage me and continue to love me here. This gives me motivation and pushes me to continue fighting for this club and to give my best."