It would be hard for me to place a vote for my " favorite" when I use a lot of them regularly. For the most part I use a three blade most of the time, but it could be a mechanical or a fixed.
This year I used:
Montec G5,
Rocky Mountain Titanium
Rocket Hammerhead 3L
Magnus two blade 125
Game Tracker Magnum First Cut Expandable
Game Tracker First Cut Expandable