Before 2003/2004, nothing was wrong with it. It kicked ass. But the Toa became all angsty friends in 2004 and on and the storyline started sucking and now it's a piece of stuff.
I remember when the sets had actual MECHANICAL FEATURES because it was fricking Lego TECHNIC. Then they just turned it into a bunch of buildable action figures and forgeted up the whole point.
forget YOU if you think Bionicle is fine right now.