Along with my Blacksmithing trade, I am also a dealer in fine cutlery, and some that are "worry free" while carrying..that is, low cost but still quite good.
Since I have many used ones to chose from, I usually carry to suit the occasion, and keep an old cigar box sized container full of carry folders in my study. For everyday carry I will usually carry a 4" Buck Creek stockman (carbon), a Victorinox "Swiss Champ" (a bit bulky)..for the last 3-4 days I have been carrying an old Ulster Scout knife (carbon).
For Sunday dress, it is either an ultra thin Queen "Senator", a very thin Victorinox "Pocket Pal", a Camillus yellow peanut or a Queen.. pearl handled pen knife..
In the woods I field dressed my deer last season with a 4&1/4" (closed) Buck with zytel type handles. It could as well have been my Frost (of Sweden) high carbon (non-folding) hunter.
For survival etc. I like the Ontario line..the Air Force survival, the Kraton handled "Quartermaster" etc.
My Grandson, a Spec Ops Marine..now on his second deployment in Al Anbar (Ramadi/Falujah areas) can vouch for the great versatility and toughness of the Ontario ASEK knife he was given by the Ontario Pres, before his first deployment . IMHO..Probably the best "all purpose" straight knife I've seen.
www.ontarioknife.com I really like the old high carbon knives and have a small "flock" of them I carry as the whim strikes me..some of these brands..
Utica, Ulster,Schrade, Robeson and various German brands such as Buchel, Otter,Herder, Senator & Swanwerks etc..many firms of which are no longer in existence.
BTW..Some excellent high carbon steel ..in low cost folders, check out the Opinels..