Well here goes. Moving takes much thought - there are however the following points to look out for:
1. A 7 food tile (in-town crops) square to lie on - Many things are much easier with 7 food tiles, and if you can find a place that has a reduction in stone its optimal in regards to resource flow during your game.
2. Special spawninghubs/sovereignty squares that has 10+ food value - these boost your food production in a given city notably and can be quite useful - especially if your city has less than 7 food tiles (in-town crops).
3. Factions. As the game progresses, establishing fruitful relations with our surrounding factions will benefit our game - so lying near these make it easier to trade with them or - if they are hostile execute attacks/raids on their hubs in the future.
So far =CE= as a whole are focusing on good relations with: The Undying Flame, the Outlaws, The Trappers, and the Sundog Gith in Meilla.
We conversely plan to attack: The Daedalons, King Sigurd, Lords of the West, Duchy of Keppen.
As the game moves forward, there may be additional factions that will end up on our good/bad side, but so far we have agreed on this method of approach.
4. Strategic reasons: If you look around the map youll notice the broad geography. Right now its fairly meaningless in regards to travel, but once pathfinding is implemented, travel will be made much more demanding - and slower. Hence, rivers, roads, and narrow passages through the mountains become vital points of interest that will help us direct/control/tax the traffic in our area and serve as sentry outposts. A few of my cities are placed to promote this, eg. Falkenborg, Bulwark, Mastodont and Marienborg. There has been talk between us of establishing a foothold near the coast for our alliance, but so far we have been too preoccupied to make the effort. Later on this may be relevant to look into.
When choosing you place to stay, bear all of the above in mind. Then go to the strategic map - accessible from the World map menu.
Once there, choose from the dropdown menu: Colonist Empires, Wheel of Time, Warriors of the New. Switch them to "on" and you will clearly see how our closest neighbours lie in relation to us. If you switch all towns "on" you will see how the demography lies scattered across Fremorn - In any area you do not see us or our neighbours dominate, would be suited in finding a good spot to settle. This will give you room to find new untapped resources in your immediate vicinity, while still enjoying the protection of the alliance. You may wish to move one of your cities to the far west outback of Fremorn to have it lie protected behind the bulk of the alliance. If you are ever attacked by armies or thieves, moving your advanced resources to a distant city is a great way of avoiding large pricy losses - trick is to make it a city that is easy to overlook.
My overall point is that =CE='s strategy is to dominate Fremorn at all costs (without starting unncessary wars), and how you decide to work yourself into this project is really up to you.
You (the individual player) need to think the whole structure of your cities through - each city's individual purpose and potential and gradually move towards realising it while keeping defensive/strategic issues in mind.
I can't tell you the right way of doing things, everyone will have to make his/her own system work, but now that you know my thoughts I hope it will help you in finding the right spot for you
Anyone that find interesting spots to settle can post them in this thread - Cheers!