Honestly, my fav is the Royal Rumble. I love it when 10 wrestlers are fighting at once, it's too entertaining. Most of the legends often come back in the Royal Rumble.
I liked the Attitude Era because it kept a Tv-14 rating, being more entertaining with legends like Stone Cold, The Rock, Edge, and Triple H.
Ruthless Aggression brought in many more legends, like Cena and Orton (hope you get back to wrestling soon). Because of keeping the consistent quality from the Attitude era, and keeping a TV-14 rating, that is my second favorite.