Because I am a "working" supervisor AND the head of the IT department (consists of 1... me) I have to change the way I act, but cannot change the way I look. This applies to work only. I am the head of the maintenance department and dress the part of a maintenance electrician (we manufacture garbage bags and plastic sheeting.) I have to go out on the plant floor and fix things; dirty, hot, messy things. Then I may have to go into the office and fiddle with a PC or jammed printer, set user permissions or sit in on a budget meeting. In the office, I feel out of place in my "grungy" work clothes, but I act professional. So, no, I do not act the way I look. It bothers me when I have to interview someone for a job and their first impression of the maintenance supervisor is this guy in dark, greasy clothes.
At home I dress comfortable, make stupid faces and noises at my kids and annoy my wife.