I used to live in an apartment, but moved to a home.  Have you ever lived in an apartment?
I lived in multiple apartments when I was in school. I lived in a complex as well as a self-contained housing unit
The last apartment I lived in was huge and had a great pool and a gym.  Did your apartment complex have a pool?
It did.  I prefer having a landlord over a complex management though
We bought a home and prefer single-family living much better.  I really prefer not having to tote groceries up 3 flights of stairs.  Apartments are called "flats" in the UK which I find to be charming.
Apartment buildings can also be called complexes, flat complexes, tower block, high-rise, or mansion block
I've lived in studio style apartments before, when I was in college.  That was just like living in one big room.
I don't think I would like that.  Multi-story apartments can be referred to as mid-rise apartments as well