by I Eat Tables
I agree with a lot of people so far: It's somewhat situation dependent, but most of the time there's a rough valuation you can give the territories.
As for former discussion, there's been a bit. Mostly, people agreeing Fertile is best and Wealthy is worst.
1) Fertile: As others have said, yellow tokens are important, and getting 3 of them is huge. Having to invest that food into pop costs you an action in age I, and probably 2 actions and a little food in age II but after that, it's just far better than Inhabited Territory, and gives you a massive population advantage.
2) Inhabited: Fertile's little brother. Each one essentially gives you a yellow token in the bank, and 1 or 2 yellow tokens straight into your unused workers, which is pretty nice. Loses a little less tempo than Fertile, but TtA isn't much of a Tempo game. Still, that edge can make it better in some cases.
3-4) Developed & Strategic: Things get a little fuzzier around here. One thing I think both of these share is that the age II version is much better than the age I version, relative to the differences between other territories age II and age I versions.
One particular quirk of the Strategic Territories is they're a lot more valuable if they come up at the start of an age. Drawing three age II military cards before your first turn in age II can be a massive edge. Or you could draw three total duds, but you know, there's a good chance you'll see something good. Similarly, drawing five age III military cards is massive, especially if you're going military - five cards at once is a huge chunk of the deck and gives you very good chances of finding 1-2 cards you want. The strength bonus is quite nice as well - probably smaller than the yellow tokens of the above, but it's a good boost, and in particular makes it a little less risky to bid on them as your military drops 2-4 points less than it otherwise would. But late in an age, these aren't worth much, as late military cards are a lot less valuable.
Developed Territories main bonus is the yellow tokens, but the science boost can be great if you missed out on good labs. I much prefer Age II's, because it's twice as many yellow tokens. The science bonus is perhaps a little less important at that stage, but it's still a good chunk of most techs in one go. The blue tokens are kind of nice as well, but corruption is rarely much of an issue - those blue tokens I guess might save you 2 resources in the long run, or so? It's not big. But yellow tokens are a big thing, and while you get less than the top two territories of them, I'd say the secondary benefit of the science is probably a little better (and blue tokens as well).
5) Historic: Perhaps the easiest way to note the flaw in Historic Territory is to point out that each yellow token is more or less half a happy face, as every two of them decreases the happiness you need by 1. And yellow tokens have other benefits as well. On top of that, early culture is rarely much use. I'd much prefer any of the one time benefits to 6 culture. Historic Territory II is a bit better, because it comes out when you probably want that 11 culture, and 2 happy faces is actually quite substantial. But at the same time, Developed and Strategic II are much better, so it stays in 5th position.
6) Wealthy: The main issue with Wealthy Territories is that you rarely get back more than what you paid, even if you don't pay very much. Two or three blue tokens are not worth very much. Perhaps 2 resources in corruption somewhere down the line. 4 if you're lucky (unlucky?). So really, Wealthy Territory works out as little more than 5/8 resources. How much does your military cost to sacrifice? At least 2 resources and 3-4 food just for a warrior. That's already about the value of Wealthy Territory I! What this means is that Wealthy Territory essentially serves as a chance to trade resources about a little, and not much else. Well, unless you have a leader who keys off of territories, that is.