I like to see good taste.
*
Of course, good looks don't hurt, as long as they aren't accompanied by arrogance.
I like to see signs of intelligence, kindness, and passion for SOMETHING. I like when the profile is "relatable"; the person is not so good-looking, so cool, so accomplished that you can't imagine they'd ever be interested in you. A bit of vulnerability & humility goes a long way in that regard.
I don't do online dating anymore though. I find dating people connected to your social sphere makes more sense. That social connection is there for good reason - you have commonalities that can't be defined easily on an internet profile.
*stole photo from another INFP on another forum.