You stated the same reason twice, and also I'm pretty sure for some of these it's just because the characters are what more likeable, so your reasons don't even make much senseThe reason you feel these chapters are better than the main ones are two:
[ol]-These are self-contained oneshots, so they don't carry the frustration of having watched heck knows how many chapters without a single hint of further progress beyond the speed of a crippled turtle.
-The stories start and end in a single chapter, so they have to condense all the development into a few pages, making it faster by comparison.[/ol]
I meant to say "way" not "what" lolYou stated the same reason twice, and also I'm pretty sure for some of these it's just because the characters are what more likeable, so your reasons don't even make much sense