Lemming42
Arcane
I felt like this the first time I played PnP. Just remember that cRPGs are a totally different deal than PnP with totally different strengths.
Do elaborate.
Well, get your mates to play a Fallout GURPS game (there's a ruleset already made: http://gurps.fallout.free.fr/data/GURPS_Fallout_compilation.pdf) and then play the actual Fallout and find the differences.