Not an avid Pin Collector, but see no harm in doing so...
I have bought a few Disney Pins from time to time, like an "Animal Kingdom 1998" pin I saw I liked. It was the last one, seeing how it was the end of 1999, I thought I would buy it. I also bought a "Christmas 1998" pin with the little black lamb on it because there seems to be so few of anything featuring the little black lamb.
But collecting them in sets? Gotta have them all? No, thank you.
I do happen to have the official Walt Disney World 25th Anniversary matted and framed set of pins (Aladdin's Genie, Simba, Goofy, Sorcerer Mickey, Tinker Bell, amd Lumiere mounted on a nice matte, nicely frame). It's nice.
I bought exactly two of the "2000 Celebration of Walt Disney" set - the very first one (of Walt), and the "Davy Crockett" misprint.
Then there were the occasional Resort pins I would pick up - but only if dated. And also when the Disneyana Conventions at WDW were an annual event, I would pick up one commemorative for the Event, plus another for the Public Day.
There were also the freebies given for the Disneyana Convention(s) "Company Showcase", a "preview" of upcoming Disney merchandise and activities. Lots of pins (but limited only to Disney Conventionears) were given away promoting the different areas of the Disney Company (Disney Music, Disney Cruise Lines, Disney Vacation Club, the Walt Disney Classic Collection, etc., etc.) Many of these pins were lenticular ("buttons").
When the lanyards started showing up, I said, "No more pins for me". I'm pleased with the ones I was able to purchase or that were given to me as part of a "Package", but I will not go out of my way to buy pins, and really never have.
For kids I used to think they are fine as collectibles and/or souvenirs, and they were really kind of neat idea - cheap, fun, colorful reminders of the parks and characters.
But now? No. They have become too expensive, too prevalent, and just no fun anymore due to the supposed "Secondary Market" value placed on a scant few of them.
I don't go to WDW to have to tote fifty pounds of metal strung around my neck on a lanyard. A camera weighs much less.
Plese understand that I am *not* opposed to collecting them; it's just not what I collect.
So, my vote was the middle choice.