I play Frederick (cre/phi) and I ALWAYS use pacifism, even when I'm at war. I think it's too costly for a city to use a lot of specialists without the bonuses to GP points. My strategy is to build a few early wonders (oracle, parthenon and great library) and then generate great people. But most of all, I use it because I think great people and specialists are what makes Civ4 fun Oh, and I'm talking multiplayer here. I don't play single player anymore cause civ4 has no AI.