If the OP means the beginning of the games, then I disagree. KH2's beginning (besides having to earn a crapload of munny) was the most emotionally moving part of almost any game I've ever played. I have to resist tearing up every time I play it, even though I now know what's coming.
But I agree with you about Days, however. I would also like to add CoM to the list of games with bad beginnings. It covered the battle mechanics WAAAAY too fast, and really, who reads the instruction manual?
BbS's beginning looks very interesting so far. It looks like it will have all the character bonding that I loved in KH2, but not the somewhat excessive 2-hour length.