With you on the laptop thing, I'm 90-ish kilos and with a good backpack I wouldn't care if it was 2Kg or 6kg, between all the other stuff in there the laptop of

With you on the laptop thing, I'm 90-ish kilos and with a good backpack I wouldn't care if it was 2Kg or 6kg, between all the other stuff in there the laptop often isn't the heaviest thing in there.