I can't really pick which song I like the most. At first my opinions coincided with the order of the sales rankings ("Akai Nikkichou" > "Kiiroi Osora" > "Aoi Sports Car") , but Aoiro's song has been growing on me for a while (despite frowning upon guys with blue sports cars
).
It's funny when you compare the 2000 shuffles with the 2001 shuffles, because 2000 featured a bunch of people who would be gone within the year (T&C, Sayaka Ichii, Danielle) while 2001 saw the shuffle debut of several H!P mainstays (4th gen MM, Melon Kinenbi, Aya Matsuura). I've just recently watched the Hawaii Battle special that Mucca mentioned, and it's such an interesting sight to see H!P in the beginning stages of its first major transitional period.
Has anyone seen the Utaban/Tokuban with the 2000 shuffle groups? The hosts convinced Miho Shinoda to do backflips into the jumprope challenge, and Kaorin almost blew her lid at Danielle in the musical chairs segment. Pretty crazy stuff.