Heavyweight champions share a variety of qualities -- but one that often exposes their true nature is the desire for more success as soon as it is achieved.
Take former Manchester United manager Sir Alex Ferguson, whose satisfaction of winning the Premier League would last as long as the very next morning, whereupon he started planning his title defense.
Or Serena Williams, say, who revealed her mindset after she won her 17th grand slam on Sunday, so matching the tally boasted by the legendary Roger Federer in the men's game.
"I think I'm a little crazy, like something must not be right, because I don't even relish the moment enough," the American said after her success. "I just automatically think: 'What's next?'"
The same approach is adopted by American jockey Russell Baze, a veteran of his sport with a sizable collection of wins to his name.
Nothing too unusual there until you realize that Baze is 55 and that his career wins have eclipsed the 12,000 mark.
"You don't look back, you always look forward," the Hall of Famer told CNN, before giving further insight into his single-mindedness.
"Every year when the babies come out, you are always looking to the good two or three-year-olds."
What makes Baze remarkable is that he has ridden in over 50,000 competitive races.
Firm statistics are not out there to prove it but Baze is likely to be the sportsman with the highest number of competitive appearances that the world has ever seen. Certainly, no other jockey has ever ridden so many races.
Nonetheless, so fixated is Baze upon the buzz of being competitive in every race that he is still checking out credible rides for the future -- even as he approaches his 40th year in the sport.
"There's just no more exciting thing to do -- especially when getting paid for it -- than being a jockey. It's very exhilarating," he says.
"I just really enjoy the competition and matching my skills against the other guys. I still really love winning the races."
Now based just south of San Francisco, Baze started riding competitively in Washington state as soon as he was allowed to -- when turning 16 in 1974 -- having been born into a family which had racing as part of its stock.
His first win came a few months later, on a horse trained by his father, a former jockey himself, and the total prize money that Baze has since accumulated stands at a staggering US$186 million.
His career has spawned seasons in the highest echelons of American racing, in Southern California, and participations in the Kentucky Derby and various Grade I races, but it's in the lower end spectrum of racing in North California that Baze is best known (or not, given his relative obscurity outside of racing circles).
At Golden Gate Fields, the diminutive jockey -- who stands just 5'4" (1.63 meters) -- is a giant of the track, fully able to satiate his fierce competitive instincts and, equally as importantly, be given rides that have every chance of crossing the line.
"I am very competitive. No matter what I put my hand to, I try to win it," he says.
"Even tennis against your wife?" I jovially ask, following up on some small talk earlier in our interview.
"Yes," came the succinct reply long on steel and short on humor.
The response elicited a degree of sympathy for wife Tami, who he married aged 20 and with whom he has four children, but in reality, Baze credits her with providing the bedrock for his phenomenal career.
"She is definitely a big part of my success," he says. "If a guy doesn't have stability or foundation, then I think he is going to wander off the path -- and not be able to physically do it. It's a big part of it."
For nearly four decades, Baze has not just followed the restrictive diet of a jockey but also led the way in meaty statistics. Of his 50,000 races, a milestone he achieved in January, 'Russell the Muscle' has finished in the money -- the top three places -- over 28,000 times.
He has ridden so successfully that the family home is in Woodside, an area of California often described as one of the 'wealthiest communities in the United States.'