Mourinho is happy again at Chelsea after a tumultuous end to his spell in charge of Real Madrid, which in 2012 included a La Liga title.
Success has followed wherever two-time Champions League-winning boss Mourinho has been - at Porto, in his first spell at Chelsea and at Inter Milan - but a third Premier League title, eight years after the last, would be treasured.
Speaking on Chelsea's arrival in Jakarta on Wednesday for the third and final match of the Asia tour, Mourinho said: "I always say that the best trophy you have is the last (most recent) one.
"(But) if we win something important with this group, it will be the best for many reasons."
One of those reasons is the competition in the top-flight, with Mourinho believing defending champions Manchester United, Manchester City, Arsenal, Tottenham and Liverpool are all rivals for the title.
City have spent most lavishly this summer, recruiting Jesus Navas, Fernandinho, Alvaro Negredo and Stevan Jovetic, to bolster their ranks after relinquishing the Premier League title to United last term.
"I think they've bought very, very well," Mourinho said.
"They have the money to buy, but they have also the knowledge; they have people in the club who know a lot about football.
"They are players at the top of their careers, experienced but still young.
"If you see their age, their maturity, they are in the perfect moment of their career to go to England - no need for adaptation, no need of work to learn the project."
United and Arsenal are still bidding to add to their squad, but Chelsea's is almost complete.
Chelsea have signed Andre Schurrle, Marco van Ginkel and Mark Schwarzer this summer, with Manchester United striker Wayne Rooney the sole remaining transfer target.
The Blues squad has an experienced core - John Terry, Ashley Cole, Frank Lampard and Petr Cech, to name four - but also many developing players full of potential.
Mourinho insists he has recognised and utilised talent in young players before and applies the philosophy that if you are good enough, you are old enough.
"Any time I had in my hands young players with conditions to become top players and play for the first team, I did it," Mourinho said.
He pointed to the examples of Carlos Alberto at Porto, Davide Santon at Inter Milan - now at Newcastle after being tipped, prior to injury, to be the next Paolo Maldini - and Raphael Varane at Real Madrid, as well as John Obi Mikel at Chelsea.
"John Mikel arrived and (Claude) Makelele was on the bench," Mourinho said.
Mikel joined Chelsea after a tug of war with Manchester United and another controversial transfer saw Cole sign from Arsenal.
Cole's move to Stamford Bridge came 18 months after Mourinho met with the defender at a London restaurant, without Arsenal's knowledge.
The pair and Chelsea were fined for breaching Premier League rules over tapping-up.
Cole made a rare media appearance in Jakarta, stating his belief that he owes Mourinho for under-performing during the Portuguese's first spell in charge, which ended little more than a year after the defender's move across London.
Mourinho disagreed with Cole's assessment and had nothing but praise for the left-back.
"He gave me everything when I was here, so he owes me nothing," Mourinho said.
"He came to Chelsea, not to work for me. He came to Chelsea to work for Chelsea and he has done that for many consecutive years.
"It's fantastic and I'm happy that (after) all the problems we had at that time - because things were not done in the best way - Chelsea got trophies and he has been a fantastic player.
"He was always the first choice and that shows it was a fantastic deal Chelsea did when we bought him from Arsenal.
"He is the kind of player that you are always wishing can be your player again.
"I trust him a lot, because defensively he is one of the best, with the ball he goes forward and creates goals for the other guys, so I think he is a very complete left-back."
Cole has often been subject of criticism for off-field behaviour, but the public persona of Cole is at odds with the man Mourinho knows.
"He is a great boy and a great professional," the Portuguese added.
"With me I don't remember one single action that made me feel that he wasn't that professional.
"He is a perfect player."