At the online store for Zumiez, they have 34 cat-themed clothing items for girls, vs. only 1 that's dog-themed. For guys, there are 19 that are cat-themed, and fewer than 10 that are dog-themed. They sell skate decks with animal designs, too: 1 with a dog, 4 with a cat. They may not be as one-sided as the Urban Outfitters crowd in preferring cats, but skaters clearly go against the mainstream when it comes to pets.
How does this group tie in to the broader traits that cat people tend to have, compared to dog people? Well, the anti-authoritarian leanings of cat people show up again with skaters. I'm not sure if they have a heightened sense of disgust / purity / taboo, but I have a hunch they do. Shaming someone for "selling out" appeals to moral norms about group loyalty and purity -- not only has the sell-out defected from their group, they're corrupting themselves in the process. And skaters are one of the few groups, along with blacks, who don't mind dissing faggots, using "gay" as an insult, and so on.
Shaming sell-outs also shows their revulsion toward status-striving, in stark contrast to dog people. There's supposed to be an atmosphere of camaraderie, and if someone starts acting too big for their breeches, the other skaters will ridicule their pretensions.
I don't think skaters have a strong sense of empathy, but they're more toward that direction than being fixated on things and systems. And probably more empathetic than the male average. They do concern themselves with how their skateboard is made, when and how to fix or replace parts, what type is best suited for what purpose, etc. But they're not like gear-heads who get really into cars. Skating is mostly a social hang-out activity.
Skaters also show the cat person's characteristic disdain for mindlessly marching forward toward whatever is new. A lot of their graphic design looks like it's straight out of the late '80s and early '90s -- off-beat color combinations, exotic references (Ancient Egypt), irreverence (sacred cats in wacky situations), neon laser futurism, etc. When I dropped by Zumiez over the summer, the guys were non-ironically blasting "Wake Me Up Before You Go-Go." They aren't as deeply and self-consciously into vintage as the UO crowd, but they do value "fun and old" over "boring and new." Who wouldn't?
I've suggested before that skaters seem to be the only large, visible youth culture these days. Certainly the only one where there's initiation and acceptance, a code of behavior, distinctive group markers, regular participation in shared experiences and rituals in real life, and hence an overall sense of cohesion.
Studies that show dog owners to be more conscientious are misinterpreting those results when they then describe dog people as more "team-oriented." It's more like hive-minded -- the qualities that make you a good fit in a large, anonymous, hierarchical corporation. Their status-striving instinct adapts them to that kind of environment too -- always toiling toward that next micro-promotion. "Team" is too unspecific. Cat people are more band-minded or tribe-minded -- traditional, something smaller in scale, more typical of hunter-gatherer societies. Cat people are also more like hunter-gatherers in being self-effacing, and ridiculing those who act too big for their breeches. Dog people could only have emerged after civilization.