My problem is twofold, first, I've got small hands and it can be tough finding a knife that "fits" my hand comfortably for long periods of time. Secondly, I'm an engineering junky which means that I really enjoy using something with tight tolerances, high end materials and practical design (this also includes watches and flashlights). Combining these two considerations, most of my folders are customs in the $300 to $600 range with my least expensive knife, an old school MT Vector. All of my keeper knives get used at work on a daily basis and that consists of constant hard core use and they all show it. Are my needs/likes/dislikes the same as everyone else, no, of course not. Will Mora's/SAKs/Bucks/Kershaws or other comparatively inexpensive knives work extremely well and be enjoyable effective users, for most people, of course. I've tried the collaberations between production companies and custom makers and most of the time there were enough minor differences that I didn't like that I'd end up either giving them away or selling them. There is no right or wrong response to this question, thats what keeps all of the knife companies/makers and knife forums in business and helps keep this crappy economy from totally going down the toilet.
By the way, the only under $100 knives that I really like are a Kershaw Spec Bump and a Kershaw Ram but even with those I usually end up selling or giving them away.