While we're bitching about CS, my reason for not being particularly fond of highly specific ones (I'll use the post x amount of likes and dislikes as an example) is that either
a) they form in the rp
b) they change in the rp
c) they're completely bloody irrelevant to the rp

I don't really mind that information, personally, as much of it does come to my head while conceiving the character, and I like being true to the character (the foundations of which I post in a CS). But some things are unnecessary fluff, especially in regards to other roleplayers I've met.

I prefer a simpler CS, but I don't mind longer ones too much - it's just that they often either become irrelevant in practice, a waste of time because the GM goes 'oh, I'm sorry, I can't do it" 1-2 weeks later, or because a character develops beyond the sheet/something happens with the character that makes the player realize some edits need to happen to the sheet because "y" was the more reasonable thing for the character to do/like/et al instead of what was originally presented in a purely theoretical context.

History is good to a point to indicate someone's general life, but having half a dozen paragraphs or whatever dedicated to the task strikes me as asinine if the end result is one of the first two potential occurrences mentioned just above.

But ultimately, I don't particularly mind. I don't fill out full sized sheets for fun, but I don't mind the task either. It does get me thinking about characters I'm otherwise not too familiar with.