I feel like skateboarding is as much of a sport as a lifestyle, and an art form, so there's so much that that transcends in terms of music, fashion, and entertainment.
I consider skateboarding an art form, a lifestyle and a sport. 'Action sport' would be the least offensive categorization.
I started skateboarding at around age 10, and enjoyed the artistic aspect of it as much as the sporting aspect, so for me it was more of an art form and a lifestyle.