When I have had crushes, I remember the people having traits that are more developed than mine or possessing traits that I don't posses myself, but would like to. That's why the value of a crush to me remains little; I don't think we should date what we lack but become/improve on what we lack.
For example, people with profound political intellectual views that are outside of the box and bit 'dark' for most people, I admire a lot. Most of my ideas I don't come up with on my own but collect bits and pieces from people who's ideas I like, and combine them to form my opinions. There are some people who appear to just sit on ideas all day long; that's admirable and quite darn attractive to me because that is not how I am.
I also tend to admire and appreciate efficiency and nit-picky people. Maybe because I am so free spirited and not naturally orderly, the orderliness and 'no no no, THIS way' is quite appealing. I don't like bossiness though; it's more that attitude that if it doesn't get done, I will do it. Bossiness I tend to attribute to people who aren't willing to do things themselves so they make others do it for them. That isn't what I'm talking about here.
There's also another type of person whom I probably wouldn't ever be able to maintain a relationship with, but admire and absolutely adore. This type of person keeps the rule 'honor someone's absence' to heart. They try to always talk positively about people, aren't overly gushy and appear somewhat superficial. Extroverted, they make rounds with everyone. This type of person makes sure EVERYONE is included and acknowledged and is the last to take someone for granted. They see the good in everyone and are generally well liked. They have a gold sense of humor; their own flaw might be socializing too much and not being very interested in intellectual topics. They are the 'a little bit of everything' type of person. They always keep busy, have lots of friends, and are constantly trying out new activities. Gahh. Cool people.
But yeah, those are some traits and types of people I admire and usually crush on. Would I ever pursue them? Probably not. For me, crushes are best lived out through my head because I know my perception of the person is possibly not the most accurate, and I would rather have that bit of fantasy than actually live the horrible nightmare it would turn out to be if I pursued it.