The Serpent is the ultimate point and shoot disc, holding any line you put it on. Subdued glide and little turn combine to produce an extremely reliable approach disc. Pick your line, throw the Serp, park the upshot. Easy.
Fossil Fuel provides a slightly more flexible hand feel, increased grip off the shelf and a splash of color vs. standard Fossil. If Fossil is just a little too firm for your style, give Fossil Fuel a try!