Skyer2 said:
I like both - Civ2 and Civ3. And don't like Civ4. But only for one reason - it doesn't have spies. No, it does have spies, but they are useless. They do not have the main option - incite revolt. If Civ4 customizers will create that - I will consider playing Civ4 again.
Ok lets try to be at least a TINY bit realistic here... whens the last time a diplomat/spy has taken over a city by opening his wallet

It was a cool feature but all it was was a crutch for those of us (thats right, me included) who sucked at war, hated it, and were way better at building an economy to fund city buying. but as for my list, it goes Civ4, Civ2, Civ3. never played the original civ. Civ4 is sweet, love it. I just plain hated Civ3, not entirely sure why but mainly just hated how boring it was at times, didn't like combat, corruption was ridiculously insane (civ2's was better, but awful too). Thats the biggest reason I love civ4, corruption and shield support gone. replaced with a harsh maintenance system, but hey, there's cottages
a couple more nice things about civ4's spies that make them extremely vital and cool is:
1. They're invisible, only possible to see them is by enemy spies, and even then its not a for sure thing that they get caught
2. Can view enemy cities at no expense or chance of being caught. you lost your dip/spy in civ2 if you did that (dk about civ3)
3. Uh recon, not possible to see them- means crossing cultural borders is no problem, and you can see the army you are up against. They're a huge help (and pretty much a necessity) for modern wars.
So no, spies are NOT weak/useless... just learn how to fight a war and not buy cities. I had to kick this habit somewhat in civ2 and the way I did it was I played a few games where I planned to conquest and I was not allowed to buy a city AT ALL. that was hard but I leared a lot about warfare.