At work I always use a small SAK, usually the Classic or sometimes the Executive.
My one-handers vary, but recently I choose one of the following: Spyderco Delica, BM 905 Mini-Stryker w/plainedge, or BM AFCK. Note: These change every so often.
I also always have on my keys a Buck Minibuck, and in the fanny pack a CRKT KISS for a moneyclip, and sometimes a BUCK 503 in the pocket.
Dang, that sounds like a lot.
Jim