A388 - 26,400lbs

Good gouge I heard for the ER was on the deck at your alternate (if you have one, otherwise your destination) with 7000, 9000, or 11,000 based on which variant you’re flying (757-200, 757-300, ER respectively). This incorporates a buffer.

Most 320 guys I've seen want 6.0 or around that. NYC airports add a bit more because....NYC.

Don't overthink it. Minimum fuel and emergency fuel are in the FOM. The FCTM has fuel for a go-around and approach. Your release has contingency fuel. That gives you all the info to calculate what you need. Having an additional buffer on top of that muddies the waters. Each flight is unique and requires you to be a pilot and apply your knowledge of the weather, airports, and ATC.

I've already seen some gouge numbers fall apart due to the new passenger weights. Kind of hard to tell dispatch to remove passengers because you arbitrarily decided you want 2,000 lbs more fuel even though the planned fuel load has a 45 min reserve and 20 min contingency fuel with numerous airports within 10 min flight time.

Planned/Min Fuel for Landing is on every Flight Plan. No need to memorize it.

I always try to land by 0.

That's a bad idea. You need to land with enough fuel to also taxi to the gate. Otherwise, you might get a phone call.

But did you die?

Just put it in neutral as you roll off the runway. The RAT has enough thrust to get you up the hill on the victor loop.

Check your mic, you're on guard.