I find myself far more concerned with the lack of hair in places I want it.
I know it seems a shallow condolence, but the hair on my head grows far too fast, requiring frequent trimmings. Combined with the fact that I like it short, and any more than a week and a half to two weeks results in a mangy blob of mess on top of my head.
As a consequence, these frequent haircuts tend to get expensive. I'd do it myself, but its difficult to blend it in without just using the same guard all over (I have done this multiple times), and when it does eventually grow out it tends to look like a mushroom top.