The England No.1 earned those plaudits after a stunning display for City in their Cham-pions League draw with Borussia Dortmund at the Etihad last week.
But the 25-year-old, speaking ahead of tomorrow's World Cup qualifier with San Marino at Wembley, admits he is determined to scale even greater heights.
Hart said: "It's nice people say nice things but they are easily said.
"In goal, you can be the worst in the world two days later if you are on television and something mad happens in the game. You've got to try and take the rough with the smooth.
"You've got to remain level-headed. If you don't, it's a big slap when you do something wrong. Then people are going to say bad things about you but that's football. You can't go too far one way or the other or you leave yourself vulnerable.
"I'm still trying to improve. I hate to say it but I am getting a bit older now so I have to get in a bit earlier and prepare my body a bit differently.
"I just know every day I want to be the guy you can rely on. I want to be the best.
"I want to work hard on saving every shot. Pretty simple really. I've got no silly targets like I need to win this and I need to do that.
"I need to keep working hard, keep my love and passion for the game and hopefully good things will come."
Hart admits concentration is paramount as the solidity of the City and England defences means he has long spells when not called into action.
He said: "It's just not often that I get much opportunity to make many saves because we are so solid at the back.
"Concentration is always key. International football is not often 'you have a go and then we'll have a go'.
"I imagine, like most teams when they come to Wembley, San Marino are going to try and get people behind the ball.
"We really need to push on from here. You have got to look to win all your games until you have potentially qualified."