How 'bout a Douk Douk? I've been carrying mine for seven years solid. slender, useful blade shape, minimal parts, with a very cool history. Mine has become almost a superstitious talisman as it is a cutting tool to me. It can be sharpened on most anything you stumble across, sharpening stones, coffee cups, river rocks, emery cloth, etc. and always takes a good working edge in no time flat. It's a wonderfully refreshing knife to own in today's world of limitless knife options, and does wonders to bring you back to earth when it comes down to what a knife should be-which to me is nuthin' but a fist full of cut.
If you like something a bit more up town, I think it's also hard to beat a Queen Country Cousin, Sodbuster style. 3"ish D2 blade that handles everything a folding knife can handle and then stands ready for more.