I don't really eat chocolate but I like peanut M&M's, the weird thing is I like to bite the shells and chocolate off and eat that first and save all the peanuts and eat them last, I could easily do the same with just a bag of normal M&M's and a bag of peanuts but it's about the ritual, it's about biting one not too hard that it breaks in half and not too soft that the peanut splits, it's about biting it just right that you get 2 chocolate half shells and one whole peanut. It's very therapeutic at times and a really good way to make your mind go blank if something is stressing you out. As for your examples:
Do you start answering posts on Gáire from the top, or from the bottom?
Generally I probably see where my last post was as a point of reference and work up from there
Do you start with the latest email/tweet/article, or the oldest to keep chronological order?
Don't tweet or use FB so that doesn't apply and for mails I usually get notifications so just read them as I get them
Do you start reading a book by reading the last page?
That would be akin to heresy in my brain, never read the last page first
Do you start with the middle of the bread, or the ends?
If it is a sliced pan I never eat the ends, if it is a batch loaf or baguette I always start with the ends, they are the best part.
Do you eat your pizza from the tip or from the crust?
Don't eat pizza, never got the appeal, it's mostly just bread