... I was a 'nobody' for about 14 years, till I moved to a new town and made friends with other 'nobodies' there.
It depends upon the kind of 'nobody' you're talking about... some of them are content to have a couple other nobody friends and be left alone... but that depends upon their situation.
Then there are the ones who don't have any friends, and others treat them like shit...
To be isolated from society itself... what it's like... hmm...
Well, you feel... very cold all the time, sort of like you're covered in cold water and out in the wind, you know? And you're unlucky enough to be someone's punching bag or whatever, you get panic attacks from all the stress of being afraid all the time.
... Well, to be that kind of person... it's not fun. Don't you pay attention to Naruto?
The worst part about it is that the way Kishimoto describes the feelings you get... he isn't that far off. There are actually some chapters that I can't read and scenes I can't watch for that very reason.