Depending on the gender, I guess it can vary a lot. As I'm not a very attractive male, I can't really comment on how it might feel to be extremely attractive. I guess it could feel flattering for some people as they may get compliments on how nice they look, or even have a better chance of attracting potential partners.
I guess if you're a very attractive girl, being attractive might have some desirable attributes, for example, having a lot of freedom to choose sexual partners, psychological gain (as males tend to subconsciously react psychologically better towards girls with a higher level of attractiveness) and being the target of compliments from a lot of people. On the other hand, I guess it can also be a massive pain in the arse, because attractive females may be more on the receiving end of cat-calling, unwarranted flirting from guys or even sexual assault (in extreme cases). Also, if there is an attractive girl, then depending on the characteristics of her friends, they may try to ostracise or victimise her as a result of being very attractive out of jealousy. My ex-girlfriend told me about these things (bar the sexual assault), which is how I would have gotten an idea.
Quite frankly I think it's pathetic. Another phenomenon which happens is that people of high levels of attractiveness tend to gravitate towards each other in terms of friendship groups, be it guys who are very muscular and work out a lot at the gym, or girls who love putting on make-up and all want to become models (as an example) whilst socially excluding those who aren't above a threshold level of attractiveness (but this depends on how shallow the individuals are).
Why can't people of all levels of attractiveness just be treated the same way?