However, a succession of injuries seem to have halted Chicharito's progress in 2011-12, having managed a more modest return of six goals.
"There are different circumstances because I have had more injuries this season than last year, but I am still enjoying it," Hernandez told MUTV. "I am still learning and working hard, trying to improve day by day."
After bursting onto the Barclays Premier League scene last year, questions had been asked whether Hernandez might suffer from 'second season syndrome', but the striker is unconcerned by such theories.
"I think each year it is going to be more difficult," he said. "In the first season, not only the defenders but also the coaches didn't know me.
"I think now, and in the third and fourth seasons, they are going to know me even more.
"But good players like Wayne [Rooney], [Robin] Van Persie and [Didier] Drogba have been here five, six years or more and still play at the same high level. I need to keep working to do the same."
Sir Alex Ferguson has dealt with Hernandez's absence by utilising his wealth of attacking options at Manchester United, with Wayne Rooney, Dimitar Berbatov and Danny Welbeck featuring most predominantly this campaign.
"Everyone knows Berbatov is a brilliant player," added Hernandez. "His touch and technique are unbelievable. Then you have Wazza, who is a world-class player, and Danny Welbeck, who is doing very well this season.
"Kiko [Federico Macheda] has gone out on loan but is another good striker, as is Mame [Biram Diouf]. We are very strong in that department, and in the other positions too."