I drink mine pretty weak. I use a light roast and a 30:1 ratio. So for 750 mL of water, I use 25 g of coffee beans. It’s nice because it’s not an overwhelming coffee flavor, I get to enjoy a second cup of the hot stuff, and it’s not quite so hard of a caffeine hit. Strong coffee makes me jittery and nervous. Don’t know how people do it.
I’ve been drinking coffee daily for about the last ten years and it always makes me poop. So did my ADHD meds when I was on those. It would make me late to class sometimes during my university years. Fun times!