I like knives, I like talking knives, meeting knife makers, using knives, looking at them, etc. I'll probably get married just so I can get my favourite maker to forge a one of a kind cake knife for the ocassion.
I enjoy adding pieces to my collection and using them, so when I find something I like and I can afford it, I buy it. It's not just about function, I'm very aware that a $400 knife is rather unlikely to perform four times as well as a $100 knife.
I'm not a true "collector" since I've got no safe queens, my unique customs work for a living just like all my blades.
Because that's the way I get the most pleasure out of knives: cutting stuff!
Still, I feel drawn to simple inexpensive knives that get the job done. In fact, I tend to enjoy using them more than some of my "better" knives. Classics like Opinels, Case yellow handle CV slipjoints, Scandinavian fixed blades (everybody needs a Mora #1!) and basic Swiss army knives.