Pick up a Kevlar "knife handler" glove for your freehand if you don't have one already.It will protect your hand if you slip and allows better grip on the fish and fillets when skinning.
I also prefer the boning knifes. Filet knifes are more flexible, I like the heavy stiff back edge of the boning knifes. I have several ss knifes but I most like the "older" high carbon steel ones that will rust. Much better steel.
Maco Joe, the item I like best for sharpening is a DR jewel stick. It is diamond dust sprayed on the bar. It sharpens not just straightens like a steel would. It is great.