Angel's alter ego talks about Buffy, the Biz and Wile E. Coyote Every so often it happens--an actor takes on a role for which there are almost zero expectations, and the TV gods turn it into a bona fide fan favorite: Dennis Franz's Sipowicz, Henry Winkler's Fonzie...David Boreanaz's Angel. Created as a recurring character two years ago on Buffy the Vampire Slayer, bad boy Angel drew a raft of fan mail after just his first appearance. Angel's following grew in leaps and bounds as the "good" vampire consummated his relationship with his beloved Buffy, unleashed an age-old curse and turned into a demonic, fanged creature. No wonder the 244-year-old bloodsucker--Boreanaz is only 28 in real life--has been granted his own series, Angel, which airs on the WB right after Buffy on Tuesdays beginning October 5. The Philadelphia-born Boreanaz fell into acting while looking for work behind the cameras. A film major at New York's Ithaca College, he moved to L.A. to get into the movie business--but while walking his dog, Bertha Blue, a chance encounter with a talent manager set David on course for an acting career. His first break came as Christina Applegate's biker beau on a 1993 episode of Married...with Children. With Angel, Boreanaz--along with Buffy-mate Charisma Carpenter (Cordelia) and former Roseanne cast member Glenn Quinn (Doyle)--has left the comforts of Sunnydale for the dark streets of Los Angeles to embark on a soul-saving quest in a town replete with candidates. The Interview