You can see that all of them have an unique expression that represents their traits. I don't say that Capricorns are all time tired, but they tend to worry too much about anything ( you can see this for her eyes ) and they can be sometimes negativist. Not all of them are the same of course but the majority are.
It's just that, in almost every horoscope illustration I see, the 'negative' part of capricorn is the predominant. I'm (obviously xD) a capricorn, but a practical, disciplined one. It makes me kind of sad always bumping into a 'gloomy' representation of us. We're just a bit serious or something. I've met other really complicated capricorns, but I just think that giving another point of view to the illustration would be great, like not keeping the first impression (which is the easy one) It's just that In other hand, I think this is great, I love the other horoscopes and the way of painting is so good! I love the small details that come out of the circles, they're magical <3