#1- I edc a folder. This is because in the people's republic of communist maryland fixed blades draw too much attention (unless you are participating in some outdoor activity like hunting, fishing, camping or hiking). I wish I could say I EDC a GSO 3.5F (that is my imaginary S!K Folder) but its usually a Les George VECP or a Southern Grind Bad Monkey. Sometimes I pocket carry my necker.
#2- On any of the above mentioned outdoor activities, my 3.5 is on my belt. If I am kayak fishing, the necker is on my neck. Its better for quick access and I can just ring it and don t have to put it down for tieing knots. When hunting, its the 5.1
#3- if I was going unsupported, it would be the 5.1. I am thinking of getting a 12, which would take that roll. I can say though. The 5.1 is all I would ever need if I could only have one S!K knife. Its a jack of all trades.