One of our ETLs has full sleeves and a bunch of other tattoos (and was hired WITH them)....a few TMs have "colored" hair, visible tattoos, gauges, piercings, etc. I've never heard anyone say anything about how a particular person "looks" (well, except one, but that's because she epitomizes the "rebellious teen" stereotype and her rantings get more "out there" with every "out there" change of her hair color).