i live in kobe and i like it, because i'm not a kind of person who goes out every weekend.
kobe is confortable to live in for me, because it's not too crowded everwhere like in osaka or in tokyo, and the city is cleaner in kobe.
because there are less people and cars in kobe, the air is cleaner too.
on the other hand, osaka is a good place to play around.
there are many fun stuff you can do there.
some of my friends who like dancing go to osaka almost every friday night to go to clubs.
when i want to go to osaka, i do too. it only takes an hour.
so, which is the better place to live, osaka or kobe?...i think it depends on what kind of person you are.