Do NOT listen to people saying it sucks.
Naruto is one of the few shounens with some real depth I've ever seen. If you're able to read between lines and see behind pictures, you will be able to see how amazing narutoverse and the storyline is.
There are too many characters, ok. But all of them, at least, almost all of them, are unique characters, and adds to the understanding of the naruto-world itself.
People say it's way too long, but there is not a SINGLE arc which is useless to the history.
The plot is absurdly amazing, if you have some brain to enjoy it. Also, in almost 500 chapters, the power scale of the characters are NOT fcked up. There are lots of examples were in less chapters, the characters powers just turns to some random sht (bleach, kof kof).
There are also people saying "Kishimoto has a fetish for eyes! I can't stand seeing sharingans anymore, bla bla bla". Godamnit, since the frikin' beginning of naruto the sharingan played a godamn important role. The manga already explained why sharingan and mokuton users are so godamn powerfull, but people just ignore it, and say it sucks.
Every time a X manga is popular, there are tons of people on the absolute anti-X faction, just because X is popular (not that it makes any sense at all).
People love to flame naruto on and on, but I can guarantee, if you read it with no prejudice, you will find that you will not find a better made shounen.
I'll say it again. If you use your brain, and read it with no prejudice, it surely will be one of the best shounens ever.