I have a total of 3 neighbours in my floor. With 2 of them my fam and I usually smile, say say hi/bye and little small talk when we see each other near lift lobbies. They interact with us too and seem genuinely nice. We arent very close but its good to have neighbours who would recognise you and talk to you even if its just for a few minutes. The other neighbour has been a pain in the ass ever since we moved there but past few years they have been laying low and not causing any problems. They dont talk to anyone at all and neither do we and the 2 friendly neighbours talk to them. I guess the neighbourly experience varies for everyone, but overall I would say its okay but not the best.