'Black' or 'African-American'?

i don't find it offensive but i do know alot of other people who do. They perfer if someone would call them black. I rather be called african american, even though i was not born in africa, but i still do my traditional things and am still intact with my cultural roots. So i prefer if someone caleld me AA instead of black. that is just me. I don't know why we can't cal all americans americans. But calling me black just feels like i have no identity.