If you want choose what is your favourite knife or bayonet?
Here is my favourites:
Survival
Bayonet
Cute
I would choose an entrenching tool.
Swiss Army knife. The original Swiss Army basic model with anodized aluminum handle and four blades/tools. I have two - one purchased in 1980 and another purchased in 2005. The 28 year old knife is still in excellent shape. Both are Victorinox mfr. - I like their can opener blade better than the Wenger made design.
If you are talking utilities, then I prefer this to the Swiss knife:
I always rather liked th Rifles’ sword bayonet - nice piece of history:
Concur. Stops you getting shot/blown up AND has a lot of reach over a knife.
As for bayonet - whatever one fits on the front end of my rifle. It’s naff all use if it doesn’t!
Nice tools 
I guess my taste is for something more simple and less bulky.
My Swiss Army Knives - basic model with checkered anodized aluminum alloy handle and four blades/tools.
I purchased the red knife in 1980 and the clear aluminum handle knife in 2005.
Both are Victorinox mfr. - I like their can opener blade better than the Wenger made design.
It is called the “Soldier” model Swiss Army knife.
It is the same type as used by the Swiss military.
Swiss Army knife
http://en.wikipedia.org/wiki/Swiss_Army_knife
Victorinox Soldier Knife
http://www.bestglide.com/victorinox_knives.html
The Victorinox Soldier Swiss Army knife is a very tough and compact pocket knife and is the same model that is standard issue to soldiers in the actual Swiss army!
The Victorinox Soldier Swiss Army knife comes with ribbed Alox aluminum shells instead of the traditional red thermoplastic shells. The ribbed finish is easy to grip, and the tough aluminum alloy stands up well to rugged use.
Specs:
Size: 3 1/2 inch
Large blade
Can opener with small screwdriver
Bottle opener with large screwdriver & wire stripper
Sturdy reamer
Life time warranty
Swiss Army Soldier Knife
http://www.oregonknifeshop.com/soldierknife.html
In 1884, Karl Elsener opened his cutlery workshop in Ibach, Switzerland. In 1891, he obtained the first contract to supply the Swiss Army with a “Soldier Knife.” Six years later he invented the “Swiss Officer’s Knife” which was officially registered on June 12, 1897. Since that time, the Victorinox Original Swiss Army Knife has become well-know in more than 100 countries for precision, quality, functionality and versatility. The timeless design of the Original Swiss Army Soldier by Victorinox has proven itself for over 100 years, and still earns it the title of the official knife of the Swiss Army.
Swiss Army.com
http://www.swissarmy.com/TheCompany/Pages/thecompany.aspx
http://www.swissarmy.com/TheCompany/Pages/History.aspx
Soldier - model knife
http://www.swissarmy.com/MultiTools/Pages/Product.aspx?category=doityourself&product=53929&
Soldier “swiss army knife”
http://www.kaboodle.com/reviews/victorinox-soldier-swiss-army-knife-53929
Maker of iconic Swiss Army Knife back in the fight
http://www.iht.com/articles/2008/01/10/business/10swiss.php
http://www.iht.com/articles/2008/01/10/business/10swiss.php?page=2
That’s my favourite. The SA dagger. Forget about the organization though, It’s clear to me that they were a bunch of drunken nazi-goons but I just like the design of the dagger. My father used to own one, unfortunately as replica.
If you want something ceremonial, use a sword. If you want a fighting knife, the Fairbairn-Sykes has probably never been bettered.
I enjoy my flip-blade Spyderco “Delta Back” Knife, or the older equivalent, that served me through the First Gulf War…
My favorite classic knivess are the Fairbairn-Sykes and the SA Dagger. I have one of each, original, not reproductions.
They both fit the hand well and are balanced.
In a survival situation, there are any number of knives that offer a better “kit,” but they are not military issue, they are high-end civilian models. mostly of stainless with various features for “survival,” including wir cutters, saws, a compass, detachable spikes for climbing, etc.
So … I suppose it depends on what you want to DO with the knife.
My favorite Bayonette is a Swiss one with beautiful steel. Methinks it is circa 1909 or so.