IBM Model M buckling springs (not as satisfying as I thought it would be, also missed a dedicated Windows key which I frequently use, remapping a key for that purpose didn't work out for me)
Filco Majestouch 2 Cherry MX Blues (my workhorse, initially thought it was too light but it eventually grew on me)
Magicforce 68-key Gateron Greens (poor quality, needs constant cleaning of contacts, nice pressing weight on the keys)
Only had a brief interest in this collection hobby, still want to own ones with Cherry MX Black and Topre switches though.