Gaston Ramirez says it was an easy decision to re-join Boro on a permanent basis this summer and insists a return to Teesside was his main aim during the break.
The playmaker enjoyed a glittering spell of form during his loan from Southampton last season, helping the club to promotion with seven goals in 18 appearances.
"It was an easy decision to come back, for me," said Ramirez. "We did really well last season and I feel comfortable here.
"The gaffer has given me a lot of confidence. When I left Boro I was always thinking about coming back and I did my best to be here.
"Of course the fans played a part. They made me feel at home in every game, even when we played away.
"It's really important for a player to feel comfortable and the supporters were a big part of that."
Ramirez's previous loan spell with Hull City during the 2014/15 had been less successful, with the Uruguayan international scoring just once in 22 games for the Tigers.
But he rediscovered his form under Aitor Karanka at Boro and believes his Uruguayan teammates made his adjustment period on Teesside a lot easier.
"I knew Cristhian (Stuani) and Carlos (De Pena), and the gaffer gave me his confidence -- that's important for any player," he said.
"You can try things in games, make mistakes and improve. I saw on Twitter how the fans wanted me to come back and I always tried to keep in touch with the gaffer.
"I saw how much people wanted me and that made me feel good.
"I'm very pleased that the fans who came to every game wanted me again and I want to say thanks to all of the supporters and staff."