The L.A. Auto Show has quietly become the hallmark American car party. More than Detroit, it matters because California is where the entire car world goes to measure its wares, so imports matter as much as domestics, and Asians play on an equal footing with the Europeans. It’s the melting pot — not the heartland — and this year, as is befitting, it showcased a little bit of everything. Here are our favorites, both show-only models, and production-ready jobs. Reading the tea leaves — the economy’s back in high gear, because sexy, fast, and sleek were all themes revving up in L.A.