Excellent collection you've started. Spyderco offers a lot of variety, making it easy to find the knife that's just right for you. Best not be intimidated; just go slowly, try out some different options, and eventually you'll find what you like best.
If you were looking for a recommendation, mine would be to try a larger knife, as Warstein mentioned. Most days I prefer a knife with a 3" blade, but 3.5" is quite nice some times. A Para Military 2 or a Stretch 2 if you want something lighter weight is a great addition to any collection.
Lost to the Ages: C90GRE Stretch 1 ZDP-189 British Racing Green | C28GRE2 Dragonfly 2 ZDP-189 British Racing Green
C12BK2W Matriarch 2 VG-10 Emerson Open | C81G2 Para Military 2 S30V
Currently Rotating: C81GPRGR2 Para Military 2 K390 Ranger Green | C223GPRGR Para 3 K390 Ranger Green
C90FPIV2 Stretch 2 Straight Spine, VG-10 Rit Dye'd Dark Apple Green | C223GP Para 3 S30V Green Canvas Micarta
C41BORE5 Native 5 Lightweight REX 45 Burnt Orange | C223BORE Para 3 Lightweight REX 45 Burnt Orange
C101GY2 Manix 2 Lightweight Maxamet Gray | C28GFG Dragonfly VG-10 Foliage Green
MT27 Mule Team 27 Micro-Melt PD#1 Ranger Green | C36GPGR Military 204p Dark Green