People often dismiss Federer as just talented but not that hardworking. They forget that 99% of talented players don't utilise their talent because they're too temperamental. Look at Safin, very talented, won slams but overall underachieved. Same for Nalbandian, Rios, Haas, the list goes on.
This is what makes Federer special. Not only was he wildly talented he is one of the very few ultra talented players who utilised his talent. Recall that back in his 19-21 years, he was a hot head too so had he could've gone down with 1 or 2 slams or no slams at all if he hadn't realised what he's capable of.