OP, as others have said, it depends on what you want, and what you can or can't live with.
I used to be a top-floor person, because of noise, but now with the summers so hot, I would only do top-floor if it faced north or east, and had dual aspect windows for airflow.
I would also be concerned about escape routes in the event of a fire. Check if the building has the flammable cladding.
Ground floor might not be as secure.
Probably a compromise between noise from above and heat rising in summer.
As someone else said, middle of the building would keep you well insulated in winter, lower heating bills. But possibly noise.
Floor plans will help, yes. Make sure, if you can, that your bedroom would not be against the adjoining wall to someone else's bathroom. Not pleasant when trying to sleep!
Where are your compromises? That should help you decide.