Some aircraft are plug n' play which is great from the fuellers POV. connect, pump, disconnect. Simples!
Others need varying amounts of inputs, you know it's going to be fun when the flight crew/engineer starts battering the gauges and you know someone is going to get a Jet A shower when they "monitor" it manually by standing on the wing with the gravity point open.
And for two captains on a flight arguing about fuel, not fun when its RRR on a helo. One Cpt wants more fuel while the other is trying to load pax back on.
