I'm rebuilding my collection, starting with the small and the inexpensive. Right now I only have a Blind Horse Knives Snapp Knapp, and my next purchases will be:
Opinel #6 in carbon
Mercator
Case Peanut with chestnut bone and CV
Boker Tree Brand Penknife
Kershaw Corral Creek lockback
Buck 389
Buck 301
Boker Carver's Congress Whittler
Buck 55
Case Slimline Trapper with yellow delrin and CV
AG Russell 3" Titanium Lockback
CAS Hanwei Higo Nokami
When available: GEC Bullnose in black delrin
I might move onto some inexpensive tacticals after these.