Happy Birthday Larry! Hope the Mrs bought you something home theater-ish.
Seam and butt joints: Fiberglass tape.
Inside and outside corners (45 degress): Metal/tape combo.
Inside and outside corners (135 degress): It's this thick tape with a ruler on it, give it a secure, straight inside or outside edge like the metal, except you don't need to bend the metal. It's real thick though, requires some serious feathering.