Ice Car said:
I was thinking of trying Kanon soon, since it was also made by Key, but I haven't watch Haruhi Suzumiya yet (Shame on me). Which one do you think I should try first?
That's difficult to say. I like both of them a lot, and they are quite different. I think I watched Haruhi Suzumiya first, but that's simply because I ran into it earlier than Kanon. I think Haruhi Suzumiya was third anime I ever watched (if you don't include those I watched many, many years ago on tv).
Kanon is beautiful, funny, and a little sad at times. Haruhi Suzumiya is funny, interesting, and weird at times. It's up to you to decide which one to watch first.
One more thing. You remember the hyper rainbow bread from Clannad? Do you remember the "ultimate jam" Nagisa had to go with it? That jam is from Kanon.