I always tell myself not to compare myself to other people, but it's hard. Taking my first step outside my dorm building each day, I see people, their hairs, makeups, outfits, shoes..., and can't help comparing my appearance with theirs. In discussions, the same happens; I listen to what others say and keep asking myself if they've got better questions, better arguments etc., than I.
To me, doing/being better than others means a lot, I think. Although I hate it because I know that it only makes life miserable, I have to admit that I do have a constant urge to compare myself to others, and that the anxiety that comparing gives me is one of the major power sources that motivates me to do better and more.
I think I should transfer the object of my comparison in order to make my life more meaningful. So instead of constantly comparing myself to others, I should constantly compare myself to my previous self, so that I could be a better person than I was, do better than I did, etc., instead of being a better person than her/him, doing better than she/he did, etc.!
I still feel really young because I feel like often my desires are still very mutable. They will change from day to day or from year to year, and people will still influence me on a superficial level. But I do feel like something common that many peoples hare is: we may start something because we desire it, but when we walk away better people, either better in character or in experiences (even silly ones as long as we share good times with good company) that is critical to leading a good life. In general, that's a good rule of thumb, and something that isn't shaped or influenced by others.
That being said, I still want to successful in activities with the defination of being "good" at a few fundamental things. There's something to be said about the skill we attain in those interests most dear to us. I like to dance. I'm not as good I feel I should be but I do it cause its fun and free. That being said, I want to be good on a technical level too. I look to my role models, who are of course often at a pro level, which may be an unjust comparison. Nevertheless, I look up to them because I demand high standards from myself.
Basically, I think that when we want to be somebody else, we are just seeing the surface and not really the innate properties like her thoughts or problems. I don't think we want to be them though, we want to actually be doing their actions.
I do feel that the actions we take because we want to be somebody are inflicted by that reason, it's okay though since it will make us happy when we finally reach that somebody.
Personally, I do what I do because I want to be next to my role models, I don't want to take their place.