Flat feeling
I think the best feeling has to be when you pick up the keys to your new flat, you go round there and everything is empty. You are the only one with keys as your new flatmate hasn’t picked them up yet. The previous people living there have left you a bottle of very nice wine. You go up to your room and lie on the floor boards to see what view you will have when you wake up in the morning. You drink beer on your new terrace in the evening sun and then go and use your loo in your en suite and realise it has a half flush and a full flush function. You text everyone you know to tell them.
It happens so rarely but it is the best feeling.