Fresh from penning a two-year deal this Wednesday, Law admits he was eager to rekindle his productive working relationship with McCall having previously played under the Bantams boss at City, Motherwell and Rangers.
The midfielder feels that he has played some of the best football of his career under McCall and he is looking forward to reaching those similar heights at a club he knows so well.
Law said: "I've always said that no-one believes in me more than Stuart.
"His belief in me is huge and that gives me great confidence.
"He's always seemed to get the best out of me, especially in my previous spells at Bradford and my two years at Motherwell.
"If I could hand-pick one manager to work under, it would be Stuart.
"To come back to a club where I throughly enjoyed my time before as well, I don't think I could ask for a better move."
Law's return to the Bantams will see the attacking midfielder play for the club for a third time after two previous loan periods in 2007 and 2008.
Even before his loan spells with Bradford at the start of his career though, Law was no stranger to Valley Parade.
With his father, Nicky Law Snr, City's manager during 2002 and 2003, Nicky Jr and his brother Josh, also now a professional footballer, used to come to the ground on home matches.
Law added: "I first came here (Valley Parade) when I was ten years-old and my dad used to bring me and my brother.
"When I was being shown around earlier before signing, I could see some of the areas where me and Josh used to run around and cause mayhem as young kids!
"This club has been a part of me since then and I suppose I always hoped I would come back again after two successful spells here before.
"The club is in a lot better position than it was when I was here before. Everyone you speak to at the club is excited by the prospect of the season ahead.
"There is a real buzz about the place and I'm delighted to be a part of it now."
With City amassing over 18,000 season ticket holders last season, the tremendous noise and atmosphere created around Valley Parade was one of the hallmarks of home games throughout the 2015/2016 campaign.
Having regularly featured in front of over 40,000 during three years at Rangers though, Law is no stranger to playing for large home supports.
He added: "When this club looks at bringing players in, I'm sure they look at whether they have that experience of playing in front of the sort of crowds you can get here.
"With Rangers, it is not just the size of the crowds you get for games, there is that extra scrutiny and added interest in you that comes with playing for a club that size.
"It has given me great experience of dealing with those sort of situations and it is something I hope to take with me here to Bradford.
"The Bradford fans will have their own expectations for the new season. My experiences with Rangers and the demands you have put on your there will certainly help me and hopefully I can help a few others within the squad if needed."
After making his professional debut with Sheffield United back in 2005, the midfielder has already featured in eleven seasons of football so far in his career.
Despite having plenty of experience under his belt, at only 28 years-old, Law feels his best years are still ahead of him.
He continued: "That is something the manager said to me when I was talking to him about joining. He said that I should be entering my peak years now.
"I have to agree with him, and I am hopeful Bradford will reap the rewards of that.
"I hope this club does get the peak of my career.
"After a long time away, I can't wait to see the fans again and play in front of them - they might not recognise me now though with my hair gone!
"I just can't wait to get started."