In my opinion, blade and faiz were the worst riders. The sucked in soo many ways.
Hibiki was actually quite nice, except the boring plot and horrible final form, oh, and not to mention bad monster fighting.
The only things I disliked about Blade?
The meh subs and bad quality encodes.
The show itself I loved.
Now I get what you mean black fang.
The part that really irked me with that was that Decade managed to destroy an Undead. Not seal it, destroy it. It literally blew up. I can't remember which one it was, but it bugged the crap outta me.
Also that Chalice wasn't an Undead in Decade...