Individuality v/s impression !

I dont know how clear i am with my post's title.. what i meant to say is, 'will we lose our identity in an attempt to make up for a good impression' ?? i am not saying but asking :-p.. for those who have kept track of my blog since beginning (again hoping atleast there are a few ;) ), way back in one of the posts, i've written on impression- First impression until it is the best. So, if people have an impression on us, how much responsible are we for that? should we attempt so much so to impress others that we lose ourselves in the due course? after some time, we start asking ourselves, am i who others perceive me as? after all i am not able to decide how to define a 'good impression'.. opinions differ, perceptions differ.. in that case, is it possible to impress everyone? Definitely not! atleast according to me.... above all, impression is just a matter of minutes.. but identity is for life time.. so what is long lasting is what is worth it.. isnt it???