The Red Devils were often criticised for their safety-first approach this term, leaving supporters particularly frustrated as they finished the campaign troph-less.
Speaking to ESPN, the Wales manager said: "First of all, I was a Manchester United fan [growing up]. I used to climb over the fence when I was a seven, eight-year-old, get the match bus to Old Trafford.
"Right from when I can remember, I used to go to Old Trafford and then, fast-forward to 17, 18, I played for the first team. I understand how the club works, what the fans want, because I was a fan.
"I was also a player who wanted to excite the crowd, to get the fans on their feet. I want to see exciting players. I want to see Rashford, I want to see Martial, I want to see Pogba try things. That's what I tried to do when I was playing."
United scored 68 goals in the Premier League in Mourinho's second season in charge - 38 fewer than champions Manchester City.