Yeah, if you consider S1 to be emotional, maybe you shouldn't watch AS at all, because it could very well fry your brain.
Clannad is amazing tho, not my usual cup of tea, but it is very well made and very hard not to like it. S1 is fun and had a lot of nostalgic feeling for me, reminding me of those school years and AS, well, that's the stuff of legends, hehe.