Great; I shall!
Well, I love their relationship through all the four seasons, but I especially am a fan of their season 1 and 2 dynamic. The banter, the friendly rivalry, and--of course--the loads of sexual tension!
I liked that, in the first two seasons, Andy was the one actively pursuing a friendship with Harold. The scenes where Andy would almost openly flirt with Harold in an attempt to both a.) annoy and b.) get closer to him were some of the best.
Which seasons of Andy/Harold did you like the best?