Can't say I'm a big Tom Petty fan, but the man and the band are extremely well respected by other musicians. They have contributed to a wide range of other artists' recordings. Additionally, longevity (or should I say survival) at the top of the rock heap is not to be underrated. Petty and the Heartbreakers did that for three decades. I prefer the Blasters, Little Feat, Parliment/Funkadelics or Los Lobos, but that's just my personal taste.
One thing that caught me interest in Petty as a person was the whole "Southern Accents" record and tour. It was a quasi-concept album about Petty's vision of the South. The tour prominently featured the Confederate battle flag and people coming to his concerts wore it, displayed it and waved it too. Petty later came to regret his use of the flag and then actually asked his fans to not bring it to his concerts. Here's a link to an article about this.
One thing that caught me interest in Petty as a person was the whole "Southern Accents" record and tour. It was a quasi-concept album about Petty's vision of the South. The tour prominently featured the Confederate battle flag and people coming to his concerts wore it, displayed it and waved it too. Petty later came to regret his use of the flag and then actually asked his fans to not bring it to his concerts. Here's a link to an article about this.