To each his own, I guess.
To be fair, Disturbed was only really nu-metal on The Sickness. On Believe and Ten Thousand Fists they play something more akin to traditional metal. Fewer electronics, no rapping (although really, the only thing close to rapping Disturbed ever did was Droppin' Plates), and eventually, guitar solos.
I think that outside of The Sickness, Disturbed is pretty much qualified to be a Pantera tribute band or something. I heard 'em play 'Walk' once, and it was pretty much spot on, and that's when I realized that they actually have a somewhat similar sound.
Why I like them is probably a sort of respect because they stopped playing nu-metal around the same time I got disillusioned with the genre and started looking for more music, reinforcing my belief that there's gotta be something more.
They are quite repetitive at times, though.