This is my favorite complete season, although I have other favorite storyline arcs or episodes throughout the series. 3rd season was the first season I watched live on TV, and it was while E and I were first dating, and I had my own apartment. He'd come and visit me some weekends, and I'd get him all caught up. I showed some to Rina when she visited, getting her a little hooked too :)
This season introduces Faith. And the Mayor. And Anya. And so much more. The Wish/Doppelgangland are awesome, and Band Candy makes me laugh so much. Zeppo is also hilarious and funnily tragic. And then the whole end-of-season arc with the Mayor and Graduation is fabulously done. I just can't say enough good things about this season.
March 16 is when we finished re-watching all the eps, the commentaries, and special features.