"This is what I chase, I like to go into a corner and hide and watch everyone else enjoy the moment," Maguire said.
"It's just me, I don't know, I've got no reason to hide. That's just how I do it.
"I like to work as hard as I can to come up with moments like this and watch everyone just enjoy off the back of what we've done together every day."
Maguire moved into rare air with Brisbane's 26-22 victory over Melbourne on Sunday, becoming just the sixth coach to have won premierships with two different clubs.
The company Maguire keeps now is elite. Jack Gibson, Phil Gould, Wayne Bennett, Tim Sheens and Chris Anderson are the other coaches to have done so.
"It's pretty cool when you put it like that," Maguire said.
Maguire's last few years should be considered among the best by any coach, following his 2022 axing from Wests Tigers.
He helped New Zealand to a record-breaking 30-0 win over Australia in the following year's Pacific Cup final, before taking NSW to a State of Origin series win last season at his first attempt.
Brisbane, as has been customary over their entire finals run, had to do things the hard way and come from behind to snatch a win.
Across their three finals victories, Brisbane led for a grand total of just 43 minutes combined and they trailed by 10 points at halftime on Sunday.
"I didn't have to say too much at halftime, I said, 'boys, your best half is about to come', because they've done it over the last month," Maguire said.
"You could feel them and they knew that they could sense that they've been in this position and I love the fact that they've done it."
Maguire's ruthless training regime has clearly worked on the Broncos players, who looked emboldened and more confident as the grand final went on.
The coach's training methods were criticised when Brisbane looked weary midway through the season but his thirst for fitness paid off when it mattered most.
On Monday the city will savour its first NRL premiership in 19 years and the first delivered without the guiding hand of supercoach Wayne Bennett.
"Everyone talks about training… it's quite bizarre, it's quite a common talking point," Maguire said.
"Any club that wins grand finals is doing the things we're doing.
"Winning comps is bloody special. This is really special."
Maguire eventually broke free from his shell in Sunday night's celebrations.
Players initially kicked off the dressing-room party by smoking cigars and drinking out of toilet-shaped cups, with Venues NSW happy to overlook any breaches of stadium rules.
Reece Walsh also taunted Melbourne prop Stefano Utoikamanu on social media over his "stuck up" comments about Broncos players, while sledges were fired at a veteran journalist.
Maguire then came to life, spotted swinging a baseball bat on Accor Stadium during Brisbane's celebration - a reference to him famously putting a hole in a dressing-room wall with one while at South Sydney.
Maguire has had his own battles to fight at Brisbane given the criticism of his coaching methods and the manner in which club favourite Kevin Walters was axed last year.
But the 51-year-old has now emerged with an army of support from players.
"He demands a lot but we just won a comp, as he should demand a lot," grand final hero Reece Walsh said.
"I'm so honoured and so grateful to be under him, learn from him. He's a bloody winner, and I want to be a winner. And that's what we just did. I'm in awe."
