you would think that after 30 volumes of the same series mangaka would run out of ideas for the series and make something better, but over the years i have been proven wrong.

Berserk is a epic manga and deserves to have the anime version continued, this good old fantasy story telling is the type of story i going on forever.

But then you got stories like these:
Detective Conan is getting old because he will not grow up again and it has been around for a long time.

Another example is hajimmi no ippo, how can you write 94 volumes of boxing and not run out of material. Even Sylvester Stallone called it quits on the Rocky movies after the 6 movie.

the list goes on and on. I just don't see how they can keep going on.

money is great inspiration =D

________________
"when i'm sad, i stop being sad and be awesome instead."
- Barney Stinson

just bcoz you think Hajime no Ippo and Detective Conan is getting boring
does not mean that other ppl do

Pretty much this, hahah!

You say they haven't ran out of material, how can you be so sure unless you've read up to the current volume? You seem pretty convinced the authors are still churning out fresh stories!