Thread the needle

I have conflicting information about how to thread a needle. I mean, which end of the thread to put through the eye. To reduce tangles and knotting, of course. For a long time I followed the advice that I should thread my needle using the end that I just cut from the spool. Then I got entirely opposite advice from a knowledgeable individual. But neither of my sources had a very good explanation for their preference. If you have a preference, you can cast a vote in this little poll (edit: poll now closed). If you have insight or explanations, please leave me a comment!

Broken Needles

Is it unusual that I break needles so often? 2 or 3 per month? Is this typical? Must be related to the type of sewing I'm doing, using thick threads and sewing through leather a lot.

A few days ago, I had this particularly spectacular break resulting in a double fracture. One needle, three pieces. I use large-eye blunt #18 bookbinding needles as well as Crewel needles (maybe they are the same, I don't know). I'd be interested in hearing opinions on good needles!