The second episode, as in any television series, is all about character development. We see how much Ross loves Rachel and how unsure he is of fatherhood. We see Monica's anal retentiveness and her relationship with her parents. We see Rachel's attempt to move on from Barry. We see Chandler's sense of humor and need to be "the funny guy". We see more of Phoebe's free spirit and discover her "relationship" with her identical twin. With Joey, however, we only really see his love of food. (The character of Joey remains undeveloped until the second season.)
Even with the necessary character development that occurs in this episode, the writers and actors still manage to show the gang's affection for each other, and even make us laugh. It truly was another great episode.