For the record, my everyday carry it no matter what knife is an aging Benchmade/Emerson CQC-7 (it looks sort of like this, but more beat up). It's been back to Benchmade one to be overhauled, even though it hasn't been in production for a while. Every so often I run into Ernest Emerson and I always mean to buy a new knife from him. Somehow, I end up with the old Benchmade.
In an idea world, I would carry a Bali-Song butterfly knife. I love working with them, and I've spent not a little time (and more blood than I would care to admit) learning how to spin 'em. Unfortunately, too many states class butterfly knifes as "switchblades," complete with Draconian penalties for their concealed carry.