The self picture on a letter, leaflet etc is commonly used in marketing.
Victor Kiam? the man who liked the razzor so much and bought the comoany was one of the first.
Richard Branson has personalised Virgin, because people like him and his style they want to buy his products.
A lot of MPS do it on their letter heads.
The idea of putting your well possed photo on a leaflet and your partner if you have one, is to show that you are the kind of person they will let into their home.
In my opibion the photograph should be of potrait quality, makeover if required, in my case yes. Personally not sure about Doug in his garden.
A while ago we were talking about the irish Franchise Carpet Doctor if you look for their web site, you will see an example of what I am talking about.