I hate cab / racer backs, I hate rear wings, I definitely hate fender skirts on trucks. I like the look of some trucks without visors, just as I like the look of some with them. I think I lean more toward with them than without. Mine don't make wind noise, they don't limit sight, they don't leak. I rivet mine on as the little nubby things they give you to cover the screws look like heck!
There is an 85 ish short bed K10 with a plow around here that has fender skirts. Nothing else, just skirts. I want to go kick them off every time I see it!