well for 3 probably scientific, industrious and expansionist (?) for 2 i would say scientific and industrious, here are my explinations
agricultural:maybe, but it's just not what makes america america. if we imported all our food as opposed to exporting what we curently have, no one would really care that much
seafaring:again, not what makes america america our boats are prety much military and we don't heavily realy on fishing, and our private yachts are more comericial
religous: you can go either way, we have all this contreversy over the 10 Comandments, and without churches or temples america would be very different than what it is now, however having no official religon it would be hard to get the citizens to raise half the money for a mosque (spelling?) or even a jewish temple, also do you really think america could got to communism in a year?
militiristic: okay a war for every generation, but almost all countries have that. but the american people are usually not that excited about war (our leaders on the other hand...) we often have war declared on us. the american public would probably love it if the US didn't get into any wars, again take it away, and america will still be america
Comercial: true the US doeasn'y have high corruption, but the american public is more commercial than the government, take it away and america won't be america though.
expansionist: can go either way, we don't seek to expand our territory anymore but expansion was a key part of the US. depending on what time period you look at we are very expansionist or very unexpansionist, for instance, did we make japan a new US sate ?
Industrious: goes without saying, but we build roads/railroads/mines way faster than other nations, look at he railroad wars during the gold rush. without industry america would be a very different place
Scientific: again goes without saying, but when we develop a new age, we get an increased period of thought that will often lead to new breakthroughs. and almost any US city has a library, hundreds have universities, and research labs abound in evry city with a big enough population
personaly i say don't change 'em just for the sake of playability, you don't play the civ, you play the traits