There is no doubt that looks matter a lot :) And there is nothing you can do about it. I see it for example when I am browsing for introductions to find resteems for @welcoming. I am way more positive before reading when the post is suited by an attractive picture - It's doesn't have to be an attractive person, a bright smile is also great - But if its is, even more of course!

A picture/looks just get in our head even before we can read a text/talk to a person - so we already have an opinion before even hearing a word/reading a sentence.

But it's logical, since attractive behaviors often lead to looking more attractive. Of course, some people look better than others.

But everybody looks better healthy and happy than sick and depressed.