There seems to be a big love for Benchmade knives here, and I fall into that category.  Mine that I carry everywhere every day is the Benchmade Griptillian 556, no serrations.  For a fixed blade, it mostly depends on my mood.  If I throw it in my pack it is the SOG Seal Pup, but if I want to wear it on my belt it is the TOPS Tom Brown Scout knife.  I actually like the Scout better than the Pup because of the blade shape, the drop point just seems a little more user friendly in most cases.  I also have the Tom Brown Tracker from TOPS, but that thing is a monster so it usually stays in the jeep.