I prefer to live in an apartment because it is self contained 
Yes, that is true I like self contained apartments too
Depending on where you stay they can call an apartment a  flat complex, a tower-block, a high rise that is if there are alot of units in it
I presently stay in a 3 bedroom flat but I lived in a self contained apartment before moving here
I stay in Scotland we call it flats 
We call apartment in high rise condos in Canada and the U.S
Yes Americans prefer to call it apartment