 If you liked
Hunter x Hunter
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 ...then you might like
Naruto: Shippuuden
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A shounen with a, in my opinion, little more mature approuch than Naruto, sacrificing a little bit of fighting for a lot more psychology etc.
Also, Naruto has several influenses from this anime as far as i can see.
One major point of difference though is the fact that Hunter X Hunter is quite alot more fast-pased than Naruto: Shippuuden.