Echelon, you're an idiot, his nickname actually is the great, hence the reference. Hdog, I'm an idiot because that never clicked before, and Paul "The Great" Wright, I'm pretty sure you're 12 or younger so you get to live a few more years before you're allowed to be branded an idiot.
I used to really like the Undertaker, mainly for his presence and his style. I love how he always threatens the ref and plays to his strong points in terms of in-ring ability, but at the same time dabbles in a few other styles (high flying every wrestlemania, old school etc...). BUT to be honest, he really just can't talk y'know? I used to really like some of the badass promos, even though the gimmick was nowhere near as popular. But at least then it was a wrestler, not a super-hero, and that's essentially what the WWE markets the Undertaker as now, he literally has super powers. And hey, that's fine, but you like superhero's because of their unique personalities as well as their superpowers...
I actually really agree with the whole Kane thing. He's a monster and he has enough personality in that he at least shows a range of expression on his face, had the hook here and there and has direct interaction with other wrestlers. Undertaker can't really have that same direct interaction because he's on a higher level than any other wrestler, or at least that's how the WWE wants us to think of him.