"I think I am little bit different on the court and off the court, too," said the 27-year-old, who hopes that the three-year gap between her titles in 2011 and 2014 could prove a happy omen in 2017.
"I think I see life and tennis from a little bit different angle than before. Before, I was very nervous before every match. Now I see that I shouldn't be. There's things in the life that should be more important than just tennis.
"I'm not sure if it is the result of what happened, but maybe I feel a bit fearless because of what happened.
"I find out what's important and what is not. Sometimes I'm thinking on the court that I already won the biggest fight, and if I fight in the match, it doesn't matter if I win or lose the last point. I will still be happy to play."
This attitude of being somehow freed to play uninhibited tennis has already served the left-hander well as evidenced by victory in the warm-up Edgbaston grasscourt tournament in just the second event of her comeback.
"I felt very surprised. I'm still surprised," she said. "I think the grass is always giving me extra confidence. Through the tournament, I felt like every round I played better and better, which is always good sign.
"It's tough to say the level of my game. As I said, in Birmingham, it was going up. I will see how I wake up on Monday. Wimbledon feels like my second home. It feels great to be here again.
"I think we still do have a great players in the draw, even if (defending champion) Serena (Williams) is not playing. I think there's a few favourites but it's very open. So who knows who going to win?"
If Kvitova prevails, it would be a fairytale comeback, and she is adamant she has never lost the "passion" for the task at hand.
"I found out how I missed tennis through the period I didn't play. It was a difficult time to watch girls playing on the TV, me sitting on the sofa with the hand in a splint. I find out then how I love this sport. I still do have the passion."
(Reporting by Ian Chadband,; Editing by Neville Dalton)
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