What does an American accent sound like?

I'd really like to know what impressions an American accent gives, or what it "feels like" to other nationalities/different native language speakers. To me Chinese sounds sharp and quick, British english sounds old world and slightly over-proper, Irish english is pleasant, "rolling" and soft, Australian english is similar to British except somehow rougher and lazier (not that I don't like it!) and Spanish is also sharp but musical.

If you were brought up with anything other than an American English accent, what does it 'sound' like and what does it 'feel' like? (ie, the pure physical sound may be different from your associations with that sound).

And if you are American, you can give your imput on any other languages/accents you are generally UNfamiliar with but have heard in person from multiple people.

ps. Post where you're FROM! I'm PA suburbs, USA. 

Wow, this is very late, but I must respond.

Well, there is an American accent!! But America has different DIALECTS. I think that's what some people meant when they said Americans don't all sound the same. I lived in Germany and Korea for a little while and they said I had an American accent. Another American girl in Korea had a strong Virginia dialect, but to Koreans, it still sounded American. So there.