Rufus Wainwright was struck by Taylor Swift’s “positive” attitude at the Grammy Awards. The 50-year-old musician attended the glitzy awards show last month and he loved spending some time with Taylor, admitting to being impressed by her humility despite her fame and success. Rufus told The Times newspaper: “My daughter is a Swiftie and was immediately struck by how positive and open-hearted she was.” Rufus also discovered that the chart-topping star is a fan of his. The singer shared: “She claims to be a fan of mine, which was thrilling.” Rufus has enjoyed a hugely successful career in his own…