What would you consider my style to be?

I'd say you fall into the preppy end of hipster - leggings, skinny jeans, those sandals, and loose tops are hipster-ish, while the distressed jeans and that hoody look preppier to me...though I'd say it's the grungy end of preppy. As for the dress, I'd place it more hipster than anything else. though I couldn't tell you why. Definitely would be if you bought it second hand. ;)