Is it all about looks?

I went through a few other websites where people talked about either my school's sororities or just sororities in general. It seems that there are fat sororities, hot sororities, butch sororities, and everything in between. I also see that every one has something bad to say about every single sorority. I hate that in my quest to find the perfect sisterhood for me, I keep running into negative comments. I am a bigger girl and I know this. I just know that I am focused on whether or not my grades, high school activities, community service, and overall impression is good enough, and now I have to worry about being too fat, or not tan enough to be greek? I see the good in the greek life but I also see the bad.

Anyone have any advice? Personal experiences with this? I know people say recruitment isn't about physical appearance, but more rather than how you present yourself with dressing nicely and conducting a lady-like manner but after reading comments, I assume otherwise.