My pick is pretty low-end compared to most of the favorites in this thread, but hey, it's what I got.
Kershaw Leek with combo edge.
I find the design to be very svelt and sexy. I love how the blade, handle, and clip are the same titanium color.
It is very light and compact. Great for EDC.
The assisted opening may be a bit of a gimmick, but it works very well, is fun, and is legal in CA.
The blade is sharp enough to do what I need to do, and the serrations work very well.