Heh - I must be a nice guy. I've always focused on downstairs for a few reasons. I don't want to be the loud asshole, and it's not from walking. I can walk quietly and lightly, but it's tiring. lol
I do also not want to be the asshole with the subwoofer causing undue stress. I like to hear my movies, thank you, not turn the volume down. Bottom floor almost always has concrete underfoot, which helps prevent massive vibrations directly bleeding into the woodwork and upstairs. And, above all else, dammit I must have my grill. Which also means I crave an apartment with a patio/deck.
I prefer a house, but nope, not happening just yet. If it was a duplex or other style where, sure, no deck, but my Webber kettle has a safe place? My preference for first floor now has significant wiggle room.
If it has solid sound barrier properties for all units, including between floors, I won't care whatsoever about myself making noise. For the safety factor, I'd prefer it for sure. I do prefer the ease of moving furniture, groceries, and large retail purchases between vehicle and one door on a first floor apartment. Which is to say, I prefer private entry doors as opposed to hallways with an exterior door.
I have to remind myself to keep townhouse rentals and duplexes in mind - not looking just yet but will be, hopefully, sometime soon.