Jungle Bros!
Beyond Shadowgate probably has the most fluid, life-like animation.
When it comes to quality JJ and Jeff comes immedeately to mind. The kick technique is silky smooth!
Oh, please. I hope you're not being serious!
He brings up a good point: good animation doesn't always equal more frames. It's especially important in video games since frame counts can affect gameplay. For quick attacks like kicks or jabs, anything more than one or two frames would not only look unrealistic, but would slow down the responsiveness.
I love the slash attack in Strider, it's only a single frame flash of a sword. An entire sequence of the slash trailing by wouldn't have had that same swift feel when taking down enemies.