I carry everyday, and I find that when I carry IWB, I don't like FRN. I am in a tropical country, and it's hot and wet all year round. The FRN seems seems to heat up, absorb moisture and swell up, affecting the blade movement.
Because of this, I only use G-10 or CF tip- down models IWB, and the FRN tip-up ones only in the side pocket.
FRN is also softer than SS or G-10, so when you squeeze the handle, it will bend. Also IWB, if you bend over, it will bend.
SS is nice but as others say, it is slippery. Also the blade-rivet is not exposed, so if your blade gets play, I don't know how to deal with it. I don't mind SS for the small 2 inch knives, though.
I have all the delica versions. The G-10 standard(tip down)with the single steel scale(plainedge)(I think serrated has no steel scale)is the one I carry most.
The SS delica(tip down) has the blade tip almost not covered by the handle when closed, so if it opens a bit, it can poke you.
The FRN delica(tip up) is OK, but it bends, and as I said, my FRN expands.
Best wishes from the far east
[This message has been edited by SYK (edited 06-04-2001).]