I prefer a sinlge pin slider, too. I guess a lot has to do with how old your eyes are. As I got older I had a harder time focusing on multiple pins. The colors all fade together for me. Having only one pin means there is no possibilty of picking the wrong one when the adrenalin is rushing although that has ebbed, too.
I hunt eastern hardwoods for deer where shots rarely exceed 30 yards and usuallt less than that. Setting a single pin for 25 yards allows for shooting from 5 yards to 30 yards with little to no sight correction as with a speed of 265fps my arrows are always within 3" of the aiming point which puts the arrow well within the vitals. It keeps things fairly simple. If the deer is within 30 yards then aim and shoot.
I could and have done this with a pure single pin sight, but the slider allows me to practice at longer ranges and makes for more pin point accuracy for local 3D shoots.
At most I've rarely used more than two pins on any hunting bow. As I said, KISS.
If You're Not Living on the Edge You're Taking Up Too Much Space
Martin/Rytera Staff Shooter
PSAA Life member, UBP Life member
PADI AOW Diver