I like season one, I like to watch it for the nostalgia, I can still remember the first time I watched it and sometimes miss the simplicity of those earlier years.. I'll agree that it's not the greatest season when compared to the other six but I still like it. They packed so much into so few episodes, Witches, Vampires, Demons, The Hellmouth, Possession, Prophecies, Creatures, it's all there as a preview of whats to come.
My favourite episodes from this season include: Welcome to the Hellmouth, The Harvest, The Pack, Angel and Prophecy Girl.
My least favourite episode is: I Robot, You Jane