Thanks for clearing that up. Still some personality in tech choice then, it appears, but not as much as I thought/hoped. The coders have put a lot of emphasis on random factors everywhere, possibly too much, to the detriment of the game. In tech trades, do the AI value the techs equally with the same ratio towards the human no matter diplomacy (assuming they are willing to tech trade) and difficulty level? During a monarch game I did the math as there was a trade where the AI demanded gold. Think it worked out to about 0.90. So assuming it was a 1000 tech, the AI was willing to give me a 900 tech - on the assumption that 1 = 1 Actually, I assume this will scale on difficulty; seem to recall possibly Seraiel saying it was 0.7 at Deity. But will it scale on level of relationship (pleased etc) with the AI in question? Or will it be the same as long as they are willing to trade with you?