That is cool that you just started watching Buffy recently. Glad you enjoyed the first two seasons. To me Angel turning evil in Season 2, changed the guard and plot of the show. Plus changed the game in major ways. My favorite episodes in Season 1 would have to be Welcome To The Hell Mouth, The Harvest, Witch, Teacher's Pet, The Puppet Show and last Prophecy Girl. My favorite episodes from season 2 are When She Was Bad, Some Assembly Required, School Hard, Halloween, The Dark Age, Bad Eggs, Surprise, Innocence, Bewitched, Bothered And Bewildered, and last Becoming. Season 3 is where things gets even more exciting and picking up the major steam in each field on the show.