Use them as inspiration...
Way back, when I started out on my dressing, I looked at a LOT of pics. Shortly after that, I got into photography, and took a LOT of pics. Then I looked at more pics, and took even more pics. (Photos are the best way to measure progress when you go back and look at your older ones)
I must admit, the photos of the 'passable' ones were the ones that drove me more intensely to improve my appearance and photography. And over enough time, I started to figure out how to get pics that I was happy enough with to share online. (Which actually took years before I was comfortable sharing ANYTHING online).
And of course, there were (and still are) photos that are MORE than just skilled makeup and photography, and those ones I would simply dismiss as 'better genetics' than I. And although I would be envious of their natural femininty, I wouldn't feel jealous of them, or angry that I wasn't born more girly.
While I have had many highly positive comments on my Flickr page, I don't let any of it go to my head. And still would not consider myself 'passable' by the strictest definition of the word. Within 10 feet or less, I don't believe that I could pass in public (photos are easier because you can pick the angle and the lighting).
However, if I can achieve an appearance that makes me happy when I look in the mirror, then who cares about 'passing' ?