Even before he worked at Valleywag, Nicholas Carlson had taken "Alleywag" as his commenter name. I always saw that passion for the site shining through his posts. True, he sometimes exhibited the inevitable traits of his hard-to-manage millennial generation, but he's unique — unique, I tell you! — among the precious snowflakes of his generation in being able to look at his peers' self-involvement with a wry glance. He covered the beat of online advertising adeptly, and made lists smart. What Here's what I think were some of his best pieces. Name your favorite Alleywagiana in the comments. Like me, you can keep following my favorite Gen Y-er on Tumblr. Natch.