Most Helpful Guy
Here's the thing. Guys are a lot different than girls! When it comes to how you are attracted to someone guys and girls look at different things. Girls might look more at a guys personality rather than his outward appearance. Not to say they disregard appearance completely but it's not as important as personality.
For us dudes, a guy won't even consider a romantic relationship if he is not attracted to her. Physical attraction is very important! You could be the nicest, kindest, sweetest, person on the planet but if a guy does not find you attractive your chances of getting out of the friend zone are slim to none.
Here's the good news, each guy is attracted to different girls and different apperences! What one guy might say is the most beautiful and gorgeous girl, another might say is not that attractive at all... So as far as weight and body shape, it's the same thing! Each guy is attracted to something different!
I personally am attracted to girls who have a bit of fat on them. I wouldn't want to date a stick. Where as some guy might not want an inch of fat
Hope this helps answer your question :)