Why do you still have air in your bcd at the safety stop?
For me personally:
I'm slightly over during a normal stop because:
I want to be able to hold a stop in a stressful situation (more buoyant)
I want to be able to hold a stop with a gas volume below normal end pressure ("fumes")
I want to be able to still make a descent in case of a "threat" boat etc"
The amount of weight (or not) depend on the dive, and location. On vacation I might be assisting a diver in trouble or dodgy tenders. At home, potential to have low back gas and empty pony and trying to eek out as much of a stop as possible if say I've been hit by a serious down current etc.
Always a trade off as not wishing to carry so much weight that a normal SS becomes a pita having to excessively concentrate.