so you fill up even if the gauge is on F?
When I lived in a rural area of Minnesota where I had to do a lot of driving on gravel roads most of which were classified as 'minimum maintenance' and weren't even a single lane wide in each direction, THEN I never let my tank go below 1/2 during winter because in a serious blizzard you might end up in the ditch and stay there for a day or two.
I'd apply the same caution of not being below 1/2 if I was going on a road-trip and passing through long stretches of rural areas, or especially the desert southwest.
HOWEVER when all your traveling is done in urban areas, I think it is just silly to be filling up your tank if it is 3/4th or even 1/2 full.
What's worse, if you DO drive by a gas station with for some reason exceptionally low prices, you'd not be able to take much advantage of it.
But finally, the REAL issue is why do you give a crap what the rest of us think about this behavior? Bragging? Attention Whore?