Once my own personal 80's themed Frankenstein was complete it didn't really look like much. If you use a little imagination, however, you have the most kick-ass toy on the playground.
Now that I've grown up I noticed that I do the same thing with women. I'll find myself making strange lists in my head that are filled with statements like "Tina Fey's sense of humor"; "an ass like that girl from the video store"; and so on and so forth. Of course, when a person with as many eccentricities as myself gets to making a list of that sort you become aware that no one will ever really be able to check off every single box. So what can one do? Well, use a little imagination of course.
You start to attribute qualities to her that she doesn't possess. Sometimes they even help and start developing characteristics they never had before. To convince yourself that you aren't settling, you start to overlook the fact that she has no ambition and a laugh so annoying that it gives you goosebumps. It's difficult at first, but eventually it gets easier. Especially because when the lights are dimmed and she wears a push-up bra it almost does look like she has breasts like Salma Hayek. Once you've got yourself completely fooled it's nearly impossible to tell that the only thing keeping your girlfriend's head on her shoulders is a piece of electrical tape.
With any luck you'll realize that you need to stop trying to create your own perfect little transformer and start to see the person on the other side of the table for who she actually is, instead of who you want her to be. She may not be everything you once thought you wanted, but I bet your dog will never bury her leg in the back yard. You'll start using your imagination less and less and figure out what you actually need more and more. Yes, if you work hard at it, you will find that special girl that shows you how much better reality is than fiction and you'll live happily ever after. OK, well, the last part isn't exactly guaranteed. Old habits die hard I guess. Me and my imagination...
Image taken from: http://www.he-man.org/forums/boards/showthread.php?t=154132&page=5