Geez, I don't even know how many knives I have anymore. Last count was over 200 and that was a while ago. I've been collecting them pretty steadily for about 12 years.
I just have to ask...wich one of the 200 do you EDC?
Believe it or not, I've kept pretty constant over the years with a Benchmade 705/707. I've carried many different knives, but that's the one I always seem to come back to. For me the size is perfect (big enough to handle most tasks, but not too big to scare people), it fits my hand well, and it's built like a tank.
Other than that one there are a few other favorites I often reach for:
Leatherman Charge Ti (my favorite multi-tool)
Benchmade 310 Benchmite (my favorite dress knife)
Spyderco Native (work knife/beater)
Benchmade 610 Rukus (when I do want to scare people
)
You can tell I'm a bit of a Benchmade fan, I think they make awesome knives for the price and after using my 705 for years I know they can take a beating. I also love William Henry knives, but I still can't bring myself to beating up a $400+ knife. Not yet anyway, though I think a Monarch will end up as my dress knife. I absolutely love how they look and feel.
I'm also a bit of a traditionalist, often carrying Queen/Schrade/Buck/Camillus/Case knives or Swiss Army knives. Those I carry for the nostalgia of it, since those were my first knives and they were what my father, grandfather, great grandfather, ect used and carried. Out of those I love Queen's D2 Cocobolo series and Victorinox's Alox handled models (Soldier, Farmer, ect).
Hope that answered your question, I seem to change knives like shirts, but I do have a few constant favorites. I also have a few favorite custom knives, but I don't like carrying what I can't replace. Therefore, some knives I collect as users, others I collect more as art (so I don't use them). The "art" ones I can't really comment on since I don't have any hard-use based experience with them. However, many feel so well built it's hard to imagine they can't take a beating equal too or worse than any similar production knife.