Yesterday I felt like a 6. After 6-7 beers or so as was in town.
Today more like a 3, just drank a lot of champagne yesterday.
I generally feel between a 3 and a 6 after drinking, depending on my level of dehydration. I do have gut rot but quite frankly don't really care about that, the headache, dry mouth and bad sleep is what annoys me. I wake up every hour with so much thrist, I think yesterday night/morning i drank almost 2 litres of water in total over the night when waking up.
I feel like a 2 even after 2 beers usually the next day.
Additionally at level 2 and 3 I am already very irritable. If i'm fatigued more than usual it goes hand in hand with irritability and less tolerance towards, well everyone really..
I basically stopped drinking completely during the week, and in weekend only on occasions, never on my own (only exception was covid-19, i couldn't go out for almost 2 weeks so had a few drink one night).
My tips: eat a good fat meal before going to bed, and drink a lot (of water, or isotone sports drink), at least a litre. Then usually the effects are limited to tiredness and irritability. And don't smoke to much or at all, tobacco really makes a hangover worse the next day.