Guy Gardner went from being a pain in the neck to one of my favorite DC characters, largely due to the Reborn miniseries. You see a man who's been kicked down into the gutter, to one of the lowest points of his life, but he refuses to give up on being a superhero. This led up to Guy's own series (ran for nearly four years) and he continued to be a peripheral character in Green Lantern and Justice League events through the 90s, whether you like it or not! I highly recommend Guy Gardner Reborn. Oh yeah, Lobo's in it, too.