Like so many others, I've got multiple piercings (3 left, 2 right), but I only use 1 in each ear, and have for years!
I have many, many pairs of earrings, but I usually rotate between the following:
plain thin white gold hoops (today)
diamond studs - 1.5 ctw
diamond in and out white gold hoops (round stones, approx. 2 ctw)
8 mm Akoya pearl studs
11.7 mm South Sea pearl studs (I'd probably wear these daily - love them! - but for some reason they make my ears hurt - maybe it's the weight)