Well I have a modest Spyderco collection but I bought in the early years, like when they had 1 model to pick from, the C01 Worker and a few monumental Spydercos.
Which ones that got the most use?
The Worker being the first knife they offered and the first knife I got Bought from the energetic guy who was selling a new Sharpener called the Sharpmaker. Told him I didn't think anyone would buy a knife with a hole in it and bought one to help the poor guy out.His name was Sam Gleason, no Sam Houston. No that ain't right Sam Glesser, yea, sam... no no Sal, Sal Glesser. Likable kinda fella, I wonder what ever happened to him and his funny lookin' knife with the hump and hole?

Bought a Titanium Mini Police necklace too. I wore that for 10 year before I retired it.
The Terzuola Sheepsfoot was the next one to occupy my pocket a lot. That one became my primary work knife and did everything from cutting insulation and sheet rock to makin' my lunch if needed. Still pull that one outta retirement every once in awhile. That one has mismatched screws and was patched up with whatever I had available to me

.
I've been tempted to send it in for repair but it has so much character and it still works great. Wish I woulda bought 2. This knfe was a lot of firsts for Sal and gang. Fist collaboration knife, first USA made blade and first knife outta the Golden CO USA planr, first liner lock, first take apart knife for them. There are many more I'm sure which is why it's one of my favorites and has seen the most use.
The Spydercard took up residence in my wallet and lived there for 11 years, till my daughter took it for walkin' to the car through the college campus.
The Stainless Dragonfly and the FRN Dyad Jr were both gotten as a replacement from Customer Service in replacement for the Centofante on the right which snapped the only Spyderco blade I ever broke, (the Centofante in the pic was a gift and replacement from a since deceased friend and member of BF.).
The black Caly Jr in micarta was an Experimental model with no name on the box before it was officially named the Calypso Jr.
The Dragonfly Salt2 in H1 is my current pocket favorite hard use little/big knife and has took up residency in my LFP.
I don't have many newer models, the Dragonfly Salt2 and the Bug knives were the most recent purchases. I'd love to get a Lum Chinese and the Hungarian model those and a few others would be on my want list.