All that everyone had said so far.
On top of that, since my foray into the world of BV some 6 years ago, I had yet to be bored by any of the BVs I had acquired. So, what I love most about BV is the brand just does not die on me, at least not so easily.
The colorways. The shapes. The softness of the leather. The way it puddles when you set it down. The lack of hardware. The suede interior. The smell. The timeless styles. The history and handmade nature.
The fact that no one I know IRL has one. It's like a little secret!
For me, it's not just about the skilled craftsmanship itself, but also that BV supports artistry through the training programs they've put into place. BV is a company I want to support (in addition, of course, to the beautiful products they create!)
timeless designs, great workmanship, great leather and quality, innovative new techniques in dyeing/weaving/combination of leather, the luxurious feel, lack of logos etc. too many to name! I have never felt the urge to buy many other bags from other brands since I discovered BV in 2008. And I keep looking forward to new colors every season!