While I have quite a few folders my collection of fixed blades is in it's fledgeling stages. My current bush knife is a Mora #840-MG:
(not my picture)
Great knife. I was pleasantly suprised by the solid construction and quality considering I only paid $12 for it. It's a carbon blade, probably 1095. The plastic sheath is even pretty nice.
These are pretty handy. I picked up a few end of 2008 from SG. The best thing about them is they are an affordable bush knife that can handle a lot of tasks and I like to carry them inside my pants pocket! I use the sheath's clippy hook thing on my pants pocket to "lock" it in and the knife rides right there at the edge nice and secure insdie the pocket.
I "preserve" the carbon blade by just use. It's got a good patina. It got some rust on it (small spots) last summer and I cleaned it by wiping the oils off my brow and nose on the blade and "scrubbing" it good with my hanky. When I have the olive oil I use that instead. Using it regularly (in and around my home mostly) seems to keep it in pretty good shape though.
Since then I have found the one shop in Portland that sells Mora knives (mostly the red handled ones) and have a few of those. He does charge a bit more but I like the F2F service and support that and with shipping costs (except from Ragnar at Ragweed Forge) it's kind of a wash.
Reasons why I prefer Mora:
1) Pedigree and history
-- people who talk shit about Mora's have either used them wrong and/or say some form of the saying about "... I value my life so..."
-- $9-$15 'aint bad. Main issue I have with cost is the cry when you lose it aspect
. I lost a semi-custom Al Mar back in 1993 in Gaum. Had it in my open leather sheath with cotter-pins and a marlin spike while going some work on the Captain's Gig. Handrail caught the clip and forced it out of the sheath, slid down the side of the cabin, rested dramatically on the gunwhale next to my shoe; me, BM2 Branum and Mormon Don gasped and it plopped into the bay under the USS Shasta. A tear is welling in my eye now as I am sure one is also welling in Mormon Don's eye and he has no reason why. I found another knife like it but it was going for over $1000.
3) They do what a knife is supposed to do
--As Suizen noted, the evolution of the Scandi knife is all about dropping the unnecessary. I support this philosophy by using the tools and doing the same in my life. A good Scandi knife is a combination of blade/handle/sheath to be used to cut things. The simplicity of the engineering allows countless combinations of technique. Because nothing is hampering my grip on the basic Mora knife, I can grip it in numerous ways.
**full disclosure: My bushcraft knife is actually a Helle Lief Ericsson 2000 Year Commemorative knife** Probably even simpler in engineering than a Mora but cost me $90 back in 2000. Not many available right now either - let me know if you find any. The design was based off knives commonly found in Dark Ages graves but they made it with a laminated blade.
Suffice to say, the simpler the knife design, the more apt one is to learn techniques making it more versatile - that is my philosophy. Also, it's a tool; one I may like and a few I have preference over but in the end it is just a tool. The only thing that matters is what I did
with it. Dreams, intent and fantasy don't.