If we talk about the ideal Ms. Right, then we always have to specialise. Namely: THE ideal Ms. Right for ME.
1. She should have a similar vision concerning relationship as mine. I mean, I don't think there could be love if she wants to have a loose relationship where she can switch fastly and if he wants to have a steady relationship.
So, concerning me, I think she should be more focused on the relationship with me, and she shouldn't be in love with another guy unless me, and so on.
2. To my mind, the outer appearance should fit. Let's say mine and her age difference should be at most +/- 5 years, the d(m) - d(f) at most +/- 10cm, none of us should be overproportioned.
Let's say, if I look very average, then my ms. right will also be a very average looking girl. If I am 1.65, then she should be about 1.60 and so on.