Hey, I have to second the map thing... sometimes, I feel like exploring the caves, but I just get lost so easily and say to heck with it after a while. Which is a shame, you miss out on some fun areas, like the popsicle mutants.
Also agreed on persuasion... intimidation gets you yell, which is pretty dominating on psi characters. Persuasion... not so much. I think it'd be nice if mercantile and persuasion were just combined into speech :/ And speaking of that, it'd be nice if salesman affected how much merchants sell as well. I've played a whole game once without finding a single napalm -.-