in my case I went from 165 to 270 over the years and I admit at one point my body fat was over 10% for a while when I was bulking. At 165 I was very low prob 5-6%. Now im about 8-9% at 245ish and at 270 i was prob 12-14% range.
I def feel much better now. I suppose because Im bigger and also that im not trying to lower my bf below what my body feels comfortable. I feel that where im now my body is in perfect harmony. I dont have to work hard to stay single digits body fat and as long as I eat good and train relatively hard I have an easy time holding on to my mass and stay dry.
When I was at 5% I was cranky, and felt dizzy a lot prob because body fat was too low for me. Strength was a problem as well. At 270 I felt good as well but just didnt want to carry all that weight around.
I could lower my bf down to 6% again I suppose but 1.Dont want to lose strength and 2.Dont want to feel the way I used to feel all dizzy and stuff. I rather have some extra fat and be happy