My best friend and I had countless hours of fun playing the Smackdown wrestling games. Divebombing someone on a table from the top of the Hell-In-A-Cell cage is so much fun. I loved getting the AI to follow us up there and dropkicking them off the top. Do that 2 or 3 times and you have instant victory. Also, high-kicking people in the face as Shawn Michaels is more fun than it should be..
Brawl is also a metric crap-ton of fun IMO. Before my friend left for basic training, we would play that game for hours, beating the ever living crap out of each other in a custom level of his where the only way to kill someone was to blast them out of 1 of 2 narrow holes in the top of a ridiculously huge box. We easily reached 700% damage before someone would die.