Yeah, I get that too with my Integra. When I'm down to about 1/4 tank I can really fly. Still I hate it even when the tank drops below 3/4.
I have no idea why anyone would think that overfilling the gas tank would do any harm. All you're doing is spilling gas.
Has anyone noticed with their Integra that they have significant power loss when getting low on gas? I think it's the pressure build up because when I open the cap and then I go on driving the car feels way better. Is this normal or do I have a weak fuel pump?
I've also heard that it's not good to have your tank low for too long because you end up getting water vapor building up inside.