I love to make fun of Gene for his obnoxiously outspoken avarice. I also love the interviews he has done with Ace and seeing his blood pressure rise every time Ace laughs.
But, learning some Kiss bass lines you quickly find out that Gene, for all his faults (and some of those faults are hilarious), is a hell of a good bass player. And then you consider that he does that in a costume that can't be comfortable or easy to move in then add the circus tricks on top of it and you realize that he is a hell of a performer.
I'll still make fun of Gene. But I respect him as a player.
And then Kiss as a band is something. They didn't invent glam but they made it into a spectacle. They didn't invent the stage show but but they taught everyone how big a rock show could be. Without Kiss, there would be no Madonna, Katy Perry, Bruno Mars or Taylor Swift. Nor would there be the Scorpions or Judas Priest.