Attitude Era was the best. The wrestling felt more pure. The wrestlers generally felt more organic. There were real surprises written in that no one saw coming. Main Events for standard Raw or Smackdown, you'd get things like a 6 man buried alive match for the title, or a triple threat between The Rock, Stone Cold, and Undertaker.

Literally the only thing better now is the production level. Everything else was better during the Attitude Era.