While my head says that a bigger knife (FBM) and a smaller knife (AD) makes more sense, I can't help really liking a good mid-length blade. It's what I grew up with.
JParanee has picked one of my favourites with the Hell Razor - I spend a few hour the other day bringing it's convex edge back of to really, scary sharp. I've got the sore, skinless finger tip to prove it!
Another I really like is the Fallkniven A1, and of course my Busse ASH-1's (LE and Hog editions).
However, my 'dream' knife? If it's not one of the ones I already have, it might be a Busse SFNO (Special Forces Natural Outlaw), original release, satin blade with magnum handles. I've never been fortunate enough to handle one but it looks perfect - a more 'outdoorsy' version of the HR, which is more a fighter type to me.
I've got the new, longer version ordered from Busse, but I would still like to try the original.
I thought at one time that a Ferhman First Strike would be the dream knife. Great steel, great design and quality build, but it just doesn't work as well in my hand as the Busses. A real shame because the knife itself is terrific.
Pretty much any 'dream' knife for me will be from Busse (although Ferhman comes really close) because I've had terrific experience with the steel. I do sometimes wish other makers could use it though; I would love an infi version of my NWA Forum Knife for instance, even better the bigger version that tknife has!
Here are some HR's and an ASH-1: