Good twist on a common question! What knife do you really like/trust/prefer when it is cuttin' time?
As much as I try to improve on it, my go-to knife for a few years is my Murray Carter Muteki Neck Knife - at just over 7", it's big enough to really cut something, but compact enough to carry everywhere. It's got a nice thin edge geometry and a Hitachi carbon steel core, which lends to excellent cutting performance that I just haven't been able to best.
Recently, in a attempt to improve upon what I have learned from my favorite knife, I bought an upgraded forged version - slightly beefier, nicer ironwood, etc. However, it still doesn't feel so familiar and nimble in my hand as the Muteki (essentially a mid-tech).
ETA: If I really need a beater for heavy use, I'll just use a hatchet or my $2.99 Harbor Freight machete. FOr beater folder use, I just use a SuperKnife. However, I'm not afraid to really use the Carter either -- I have sharpened out two damaged tips and sanded down a scuffed handle, but otherwise it is deceptively tough.