High-resolution Chandra and XMM-Newton X-ray spectroscopic studies of stellar and supermassive black holes have revealed that these phenomenologically different systems share many common physical characteristics. The observed outflows in the micro-quasar GRS 1915+105, the Seyfert 1 galaxy MCG-6-30-15 and the Seyfert 2 galaxy IRAS 18325-5926 are the focus of this proceeding.