Best Disc that deformes so quickly it is hardly worth using: Banger GT
I love this disc but damn I wish that I could play for more than a round without the flightplate getting all bent and deformed.
Seriously though.
Best Overstable Driver: Z Avenger I second the overstable butter comment
Best Stable Driver: Eagle I love throwing this disc so much
Best Midrange: X Buzz So nice and straight
Best Midrange into wind: Z MRV Overstable but not overly so. Fights back just right
Best Putter: JK Avair X This disc is the best of all worlds for putter for me. I can drive, approach and putt with it. Although I am getting in a cryztal Challenger so that might take over as main driving putter.