Just finished Sharin no Kuni.
It was very long and at times boring as Kraco mentionned.
It was good I have to say. I would not mind watching an anime based on that one, provided the adaptation is good of course.
I was just starting thinking VNs were not really my thing. I still think it's the case, but that one was worth playing.
With a walkthrough though, you get days of almost nothing and then everything unfolds in mere minutes/hours thanks to the speedup option.
As I thought, I first tried Clannad VN due to my liking to the show, so I wasn't really playing a VN... rather I was having more Clannad.
I guess that explain why I might not play VNs again, but that I can not be certain, since a nice gem can always appear out of nowhere.