I've started GM'ing our group's first Fudge game after 20+ years playing GURPS. The change was made because our games were becoming less and less number crunchy and more and more story driven.
After about a dozen play sessions there is some dissatisfaction. One of the key areas is that the 4DF seems to swamp the skill. A character with Fighting at Great rolls -2 and gets beaten by an NPC mook rolling +1 on a Good skill. The feeling is that 3D6 has less effect on a 3 to 18 Skill level in GURPS, so a good fighter remains good more of the time ... but is this just perception? Could it be GM style, in which case what symptoms should I be looking for? A player suggestion is reducing to 3DF, just to ameliorate the dice effect. Has anyone tried that and if so with what result?
(We have a number (too many!) mathematicians at the table so any discussion on probability spirals out of control in seconds: I'm trying to avoid that!)
As another footnote - I'm looking at changing/tuning again and going in the FATE direction: the free-form nature of Fudge seems to be one step too far.