We can choose the shape of our cities, determing where they expand into. That's nice but it will get a bit dull if each city tile looks and is the same. 

What different tiles to grow your city would you like? 

Some I have thoughts of:  I am assuming a 'city building'(if we build them) won't take up an entire tile or they will complement a tile type, instead.

A rural tile - Essentially large tracts of farmland. They provide big + to food or whatever stat defines city growth. They will have little to no defensive benefit and can be raided/pillaged

Industrial tile - beefs up production and technology advancement

Market district tile - area of trade and stuff.

Fortification tile - This tile provides strongest defensive bonuses or whatever, maybe even have mounted catapults or cannons and lasers but they aren't really lasers cause they will be magics innit.