I found his voice and carnival barker delivery totally annoying, and I always either muted the TV or switched the channel. He never once sold anything I remotely wanted or needed.
But... he was an American original, and evidently a hard-working & sincere guy, who made tons of money for those products, and hopefully for himself, to leave to his widow and 2 kids. He made himself a celebrity and great success by sheer force of his personality & determination, and that's always been an admirable American trait, even if I often wished it wasn't on the TV channel I'd happen to be watching.
My condolences to his family.