My sister is very very pretty. No pics, don't even ask (let's get that out of the way). But the thing is, she was not overly attractive when she was a teen. She is more of the ugly duckling beautiful swan type of girl which I think is the best thing to be. She had her share of guys and popular girls ignoring her so she became a humble nice person. She hit her twenties and the transformation was pretty dramatic. She lost 20 lbs, got in shape, got contacts, skin cleared up, and she learned how to put on makeup and do stuff with her hair.
So what it's like, from her point of view was at first bewildering (why are these guys talking to me??) and now just interesting. She's aware of how much of the attention thrown her way has to do with looks and how many girls use their looks to get what they want. What I like is how she developed her brains and personality before her beauty came into play. So she's humble about it but still enjoys it.