Paulo Sousa told Goals on Sunday he still has regrets about leaving Swansea City in 2010.
The former Portugal international spent the 2009/10 season in charge at the Liberty Stadium, steering the Welsh club to their highest league finish in 27 years as they ended up just one place below the Championship play-off positions.
He opted to leave that summer to take the top job at Leicester City, but it proved to be a poor decision as he won just one of his first nine games and was axed after just three months.
Meanwhile, Swansea achieved promotion to the Premier League that season under Brendan Rodgers and Sousa, who is now in charge at Hungarian side Videoton, says he regrets the switch.
"It's better to do a decision than not do it," he told Goals on Sunday.
"At the time, my decision was Leicester were giving me much more conditions of work at that time, especially in the infrastructures. I thought there was more future also.
"But of course I regret it. I regret it because I passed up a fantastic, lovely time in Swansea.
"Huw Jenkins [Swansea chairman] is someone who was always very precise in his decisions, regarding the manager and regarding players. It's really clear what he wants for Swansea and the way he works gets results.
"I regret it because we progressed, we made a fantastic season together and we were very close in that season to playing in the play-offs. I was sure if we'd got to the play-offs we would have got promoted.
"In life we need to do decisions and in that time it was the best one for me."
Sousa has enjoyed as happier time working in Hungarian football, steering Videoton to the League Cup and two Super Cups since taking charge in May 2011.
He has guided the club into the group stage of the Europa League, including a famous victory over Sporting Lisbon, and says the team have lofty ambitions.
"It's a good opportunity," he explained.
"It's a club that has given me an opportunity to build it up. It's more than a project, but a process with a football philosophy.
"The main goal was to be in Europe after three years. The last time they were in Europe was 1985 and straight away in the second year we achieved that.
"We're doing well. In the first year we won the Super Cup, the League Cup and we got the record goals and points in the history of the club.
"Straight away in the second year it was really difficult because we needed to pass two qualification play-offs to get into the Europa league group phase.
"It was really fantastic, not only for Videoton, but for Hungarian football because they are far away in the rankings."
Hit the video at the top of the page to see why Sousa passed up the chance to join Arsenal!