There many different scissors out there but here are my favorites from Dr. Slick. If you are a serious fly tyer, one or two pair of scissors just doesn't get it done. I don't really know but I'll bet I have 2 dozen pair. The six listed below are what I use just about every day. They are all stocked in the shop.
Finishing Scissor: This spring-loaded scissor with finger loop is designed for one-hand
operation. Great for in-hand tying and detail work. If you are a rod
builder, this is the scissor for you as it can easily cut silk and nylon
wrapping thread. Excellent with natural materials and can handle most
Twisted Loop: By offsetting one loop and installing a gap between the loops, its a more ergonomic scissor with better control and
dexterity, while reducing finger fatigue. Excellent with natural
materials and can handle most synthetics. Fantastic if you tie with
scissors in hand. I got a pair of these a couple of years ago when they first came out and they are probably my go to scissor or on the tying bench for most everything. You can take your thumb out and flip the them around to the back of your hand while tying...outstanding!
Prism: This series has a Titanium Nitride coating on the entire
scissor. The coating creates a harder blade surface and thus makes
these scissors ideal for synthetic materials. The finish is a unique and
fantastic swirl of red, green, blue and orange, and no two finishes are
ever the same.
Preparation: The big dog in terms of cutting anything you can bring to the
tying bench! Very heavy blades with large serrations and a wire cutter
for tackling the nastiest stuff in Fly Tying Town. Specifically
designed to handle all the heavy new tying materials. Easily handles
the macro work on big, thick sheets of foam, heavy leather, yarn, lead,
wire, antron, rubber, flash, chenille, latex, tubing, braid, darlon and
the list goes on. This type of scissor is a must have on every bench.
Tension Scissors: Designed for cutting heavy materials and prep work. Beefy serrated
blades with adjustable tension for loosening or tightening of the blades
as materials warrant. Tips are fine enough to allow some detail work.
Excellent with natural and synthetic materials. They are my primary tool for shaping flies tied with synthetics.
Razor Sissors: Probably the sharpest scissors ever created. Think razor blades with
handles. These thin blades with a razor edge make short work of all
materials. Adjustable tension allows for loosening or tightening as
materials warrant. Cuts through natural and synthetic materials like
butter. Made from 440 grade J2 steel. These are the ultimate tying
scissors. I've been so impressed with these that I've bought them as gifts for friends who find them equally desirable. If I was only allowed to have one pair of scissors on the bench this would be it.