Although John Rzeznik has had more than his share of commercial success with the Buffalo-based Goo Goo Dolls (over 10 million albums sold), he hopes that writing excellent songs will ultimately serve as his greatest legacy. "It's more important to me to be a writer," he says. "I'd like to be remembered more for being a songwriter than a guy in a band."Evocative and enduring songs like "Slide" and particularly "Iris," which was written specifically for Nicolas Cage's character in the 1998 film, City of Angels, rank Rzeznik among the best in the songwriting realm. In 2008, the very discriminatin