For survival by choice I'd prefer a small fixed blade, like a BRK&T Highland. But in reality, I tend to take a folder into the woods, not that I go into deep woods.
I have a tanto SnG now, but my large tanto Sebenza has taken good care of me, too, as did its regular spearpoint predecessor. I also like the 4" Buck/Strider spearpoint, the MOD CQD and even the CQD Mark II, and especially the Extrema Ratio Nemesis. I can't help it; I have wide hands.
My SOG Powerlock comes along if I really want to impress myself with how prepared I am

but honestly, my Victorinox Ranger is always with me, and probably is more useful.
Incidently, one reason I carry the somewhat bulky Ranger is that it's the smallest SAK I can find with saw, file, and scissors.