Castles - where, when.. ?

[N3rull]

Thanks for your answers

Storyline:

Spoiler Alert, click show to read: 

I'm playing English and I want to be a peaceful dude this time. Well, except the first three turns I needed to throw the Scots out of *my* Britain .

Anyway, I set timescale to 0.5 so I have 400+ turns until gunpowder, plenty of time for a slow and steady, economical and peaceful game. I have Caen and Rennes on the mainland, but I made Caen a City (it has a huge trade potential, my teeth hurt when I feel the florins escaping my grasp every round it stays as a castle). So currently I got all of britain as cities and those two cities on the mainland.
I strongly believe that castles should only be placed inland, because inland settlements have no ports and thus their trade profits are halved, and somewhere on the frontline.

Before, when I played on Ultimate AI, the French would gladly trade Angers (castle with 2 buildings) for Rennes and 15000 florins, which let me develop an inland stronghold and not waste any of my ports' trade potential.
The problem was that right when I started spewing Retinue Archers and amassed a respectable army, gunpowder popped up and they almost immediately lost their future.

So I began the above mentioned game on 0.5 timescale and I loaded Lusted's AI for testing (it's great). One only flaw (or at least a big wtf point in my plans for the game) is that on Lusted's AI the French would not give away Angers even for (legitimately earned) 50k florins and Rennes and map info and whatnot. I don't wanna cheat here and I don't want to attack them, they shall be my friends to the end (awwwww ).

I was thinking whether to turn one of my isle remoted settlements into a castle or turn Caen into a castle again or just rely on Heavy Bill Militia?
Thus the poll.

[pwijnands]

I'd change the region with the least amount and the cheapest resources to a castle. I think trade is largely affected by the resources on the map.

There is no poll btw.

[N3rull]

On this board you have to write and *post* the thread before you're given the poll editing options. I had to leave my PC when I was making the poll, so it wasn't there for a moment.

[Cmdr_Sdxo]

I don't build castles(well okay, maybe really early in the game). Converting the larger cities into castles is not appealing to me, because I'll rather have more money and the conversion cost quite a lot too.

[N3rull]

I should've added an option "I'm playing Milan ;]"