Eye techniques are the best, most original ideas in Naruto.
Too fucking bad he couldn't stick with the fucking theme.
Sharingan: pick up any skill just by watching it - the perfect ninja skill for infiltration by imitation
Byakugan: see through everything, nobody can hide or disguise himself - the ultimate anti-ninja skill
Rinnegan: something, something invents elemental ninjutsu magic from scratch
These are awesome concepts, if handled right.
But what the fuck does sharingan have to do with illusions, black fire, or warping spacetime?