Poll: Which is the best rivalry in WWE history?

Austin-McMahon is widely regarded as one of the greatest pro-wrestling rivalries of all time

Rivalries provide the foundation for storylines in professional wrestling, and they often play a pivotal role in creating new fans. Every member of the WWE Universe has an immense amount of nostalgia for the feud that attracted them to the Sport of Kings. 

So, why not attempt to determine which was the best rivalry in WWE history? Which one of these did you enjoy the most?