The leap from zinc-plated slot head screws to todays epoxy-coated torx screws is a big one.
Based on the depth of material, what length of screw is required?
How much holding power do you need?
Heavier/larger screws provide more strength.
How should the screw sit in the wood?
Do you want it flush, countersunk, or shown on top of the wood?
What throw in of driver bit do you have?
For more information on types of wood screws available, watch the video above.
Todays Wood Screw Technology| Woodworkers Journal (YouTube)