I play my violin on the top half of my bow most of the time subconsciously but when the style of the music demands it I play with the rest. I still use my entire bow for dynamics even though it tends to lean on the upper half.
(I don’t know if this is relevant but I think it might be because I have a younger teacher that plays the cello)
Watch this video in which I talk about when to bow with which part of the bow.
Is this video useful to you? Please let me know in the comments!
PS: Do you have questions for me on violin or viola playing? Post a comment below or send an e-mail to firstname.lastname@example.org