FaceUnderMask
Warlord
1) I never annex cities right away
2) If I can pull out 10-15 hammers in medieval right after annexing, and about 20 hammers in renessansce - I consider annexing it. If I wouldn't have less than -10 happiness after annexing and it didn't has a colliseum yet I will annex it in most cases. It would turn in a decent city 15-20 turns later. Also if city is 8 or more in size and I have a gold to rush buy a theatre I also annex it.
Summing it up, the reason for annexing a city is being able to fastly upgrade it into good production\science site. Look out for river sites, food-rich sites near mountains and so on.
2) If I can pull out 10-15 hammers in medieval right after annexing, and about 20 hammers in renessansce - I consider annexing it. If I wouldn't have less than -10 happiness after annexing and it didn't has a colliseum yet I will annex it in most cases. It would turn in a decent city 15-20 turns later. Also if city is 8 or more in size and I have a gold to rush buy a theatre I also annex it.
Summing it up, the reason for annexing a city is being able to fastly upgrade it into good production\science site. Look out for river sites, food-rich sites near mountains and so on.