I've got about 60 or so knives, most have never been used and about half of them are still in boxes, mostly my SAKs. Quite a few of the SAKs are models I wouldn't normally carry but bought just for the fun of collecting (different color Alox scales, etc) and also because I'm happy with the two SAKs I do EDC - my keychain carry Midnite MiniChamp and my Huntsman. I got most of the others at clearance prices so figured what the heck.
Then there are other knives that I don't really have a need for but got them with the mindset that it's better to have them and not need them than the other way around. These would include my fixed blades like my RATs. I live in a big metropolitan city, in the centre of "Yuppieville" and rarely get a chance to head out into the great outdoors. I'm moving back to the burbs next month and will hopefully have more time to go hiking, etc so hopefully they'll get carried more. I do look forward to using them more (can't wait really!)
I've got a few select knives that I EDC because they fit my needs perfectly, like my BM Mini Grip, Spydie Delica4, G10 Dragonfly, H1 Ladybug, G10 Caly3. They're not the only knives that have some aspect to them that I like so I'm not going to NOT buy others because I can't see myself using them. I buy them because I do like something about them and want to own them, whether they get used or not. Sometimes I'll take a non-user out and EDC it for a day for the heck of it, but it usually doesn't get used because I'll have another regular user on me.
To each his own is the way I see it. I like the Ferarri at a WRC event analogy. Why use my most expensive knife to do some mundane task when one of my cheaper folder will do the job just as well or probably better.