In my case, I came into comics at a point when Green Lantern was in a state of flux. It was during the Crisis: John Stewart was Green Lantern after Hal had surrendered the ring; but the Green Lantern title featured Hal and his efforts to get himself reinstated. Meanwhile, a rogue faction of Guardians woke Guy Gardner from a coma and gave him a ring. So in a way, I got introduced to Hal, John, and Guy all at the same time.