Guess I'll preface my comment that I suffer from terrible sleep habits. Constantly on a time zone that isn't mine, and mild insomnia because of it... I never sleep well. But...
I've always read that the bitter of coffee comes from "taxing" the grounds. Like you are trying to get a full pot out of a 1/3 of the beans...being cheap in the basket. Put more in, it doesn't make it "stronger", just not bitter. The cranky old bastard that wants "strong" Joe just pulls it off as it's dripping.
I don't drink coffee. When I did it was iced. Flavor wasn't for me. Might have 1 or2 white Monsters during the week, but those come WEEELLLL after lunch.