Favorite? It depends on what I'm doing....
For getting a fire going, like we did to roast hot dogs for lunch today, I always grab one of the Moras I have to create feather sticks and tender. I have other options, but it does the job and does it well.
View media item 3426My daughter likes the A.G.Russell Woodswalker for making feather sticks, and I like it as a blade I can teach her how to sharpen. It is nice when you want a fixed blade in your back pocket instead of on your belt, but the steel requires a bit more TLC.
If I am clearing brush or limbing branches, I'll grab my 'el cheapo' machete. It is nothing special, but it works well for the job. (sorry - no pics of it)
However, most of the time, I have a Bradford Guardian 3 on my belt. It is a fantastic knife.
View media item 3427I've been carrying a Street Beat instead of the Guardian a bit recently (no pics). It is growing on me, but I like the aesthetics and the feel of the Guardian in my hand a lot more. I can't explain why, but when I grab the Guardian, it just feels right in my hand and makes me want to do a happy dance.

I am looking forward to Christmas though, because I think Santa will bring me a Guardian 3.5 this year.
Enjoy.