A hunter knows how to use his bait
So no its not about facial hair or tattoos but a picture is important. Use the picture to your advantage. Put some thought into it differentiate yourself from the millions of web-cam face photo shots and penis profiles. Be creative, because imagination is a desirable quality in a Dom, put some imagination into your photos. My advice is wear something that makes you look good, stay away from bright colors, use scene pictures i.e. your in a forest, your sitting in your office, your at your job, your with your dog who is sitting nicely for you *hehe, your at the beach, your at a sports event something that speaks to part of your character. The picture can be a great Segway to conversation it can make a curious mind think, like "Mmm motorcycle", "Sexy kilt", "Nice sunglasses"...
i guess i'll put my 2 cents in...
everyone who has posted ahead of me i think has covered everything. as for me, i'm completely new to this lifestyle, so the image that pops into my head is just an Average Joe the Plumber. i feel that looks, regardless of the individual being a 'master' or not, aren't important if he has the charisma and the ability to keep a decent conversation going (i.e. personality) to make his appearance mean little. however, if my future Master is as beautiful on the outside as he is on the inside, then i say 'bravo!'
*pardon the cheesiness of the ^^ above sentence*