10 Best WWE Ruthless Aggression Era Feuds

Feuds that begin with a wrestler being miffed at someone for eliminating them from the Royal Rumble usually don't go very well (case in point: Undertaker versus Roman Reigns from earlier this year).

But Shawn Michaels and Kurt Angle could have been feuding over literally anything - from Kurt being jealous of his counterpart's full head of hair to HBK having a better entrance song (which he does) - and wrestling fans would still have paid all the money in the world to watch them in the ring.

We got two great matches, first at WrestleMania 21 and then at Vengeance a few months later, and then a couple more - including a 30-minute Iron Man bout - on subsequent episodes of Monday Night Raw. But somehow it still didn't feel like it was really enough - which has to be the mark of a great feud.