The 22 year-old Bosnian opted to leave financially-stricken Pompey for the Potters, but while avoiding relegation with the south coast side, he also subsequently forfeited the chance of FA Cup glory with Portsmouth facing Chelsea on May 15.
Although Begovic, who moved for £3.5 million in January, is pleased to see his former side preparing for their big day, he believes he is in a better position now and is happy to forgo his chance to play at Wembley for that.
"It's good to see Portsmouth in the final but there are no regrets for me whatsoever," he said to The Sentinel.
"It was a move I could not turn down because I was moving to a lot better situation and a better club in mant respects - a club on the up with ambition.
"You could say now that I could be playing in an FA Cup final, but you never know that at the time you make a decision."
The young goalkeeper, who has since made nine appearances and kept two clean sheets for the Potters, also pointed out the significance of Portsmouth's achievement under such difficult circumstances.
"It's nice for the club, the fans it's a great acheivment," he said.