Families
1. Spyderco Military or Paramilitary
2. Benchmade Minigriptilian (over Griptilian)
3. Spyderco Endura (over Delica)
4. Victorinox Soldier or Farmer
From my currently owned folders, specific favorite models are:
1. Spydie Millie (S30V G10 PE)
2. BM Minigrip 555HG (154CM CE)
3. Spydie Endura 4 Wave (VG10 PE)
4. Vic Soldier
After owning these knives, I really don't feel the need to try many others. These suit my needs quite well.
BTW, yes, I know you asked for 5: Millie, Para, MiniGrip, Endura, Soldier, there you go. I just don't own a Para anymore... stupid me! My current collection has 1 Millie, 2 Minigrips, 1 Grip, 2 Enduras, 1 Delica, 2 Soldiers and 2Farmers.