Food is great.
People walk very fast. (Osaka people are the fastest walking people in the world)
Public transportation is well established.
Girls are friendly and speak "kansai-ben" (dialect).
Living cost is as expensive as any city like Tokyo.
There are more modern buildings than ancient architecture.
Night life? You have to see it yourself...
You wouldn't be bored in Osaka if you like being in a really busy city.