mangekyo shaaringan is godly. but the power of rinnegan hasnt been shown yet. i dunno, i really like all of em. haku's ice ability seems awesome. as does kimimaru's bone pulse. byakugen is not as great as the other doujutsu but its still good. mukotan i never really liked too much even though it is very powerful. im still undecided on diedara's explosive clay though. it can be cool at times but then again it isnt. im really looking forward to the next chapter where rinnegan is released.