#1 Blood
I know what you're thinking. Blood has been banned in the WWE, whilst in the Attitude Era it flowed like a river.
And you're exactly right, and that's what makes it better now.
As the company is PG, intentional blading has been removed from WWE, a sharp contrast to the late 90s.
However, this means that any blood seen in WWE today, is real, and adds to the drama of every match it is seen in.
Look at Randy Orton vs. Brock Lesnar at Summerslam 2016. The Viper was left in a pool of his own blood by The Beast. A truly shocking moment that left everyone talking.
I can't think the same fans would've been as excited, if they'd seen oodles of blood earlier in the night, or if they'd seen it on RAW or SmackDown Live each week.