for me, personally, physical intimacy is important in a relationship - expressing myself through touch, embrace, sex, etc. is a big part of relating to the other person
so physical attraction is a necessary component - even if it's not the only thing
having said that - what makes someone physically attractive is very dependent upon their personality, their demeanor, the way they express themselves, their humor, body language, chemistry, etc.
it's the total package that determines attractiveness - not just quantitative data like height, weight, age, measurements, hair/eye color, etc. You can write the same numbers down for two different people and they can be nothing alike in terms of attractiveness
and lastly, what I personally find attractive is not necessarily the same as what someone else may find attractive, let alone what is put on display as the "ideal" beauty by the mass marketing machine