Three pages and Anno wasn't mentioned?
My understanding is that the majority of the playerbase prefer Dawn of Discovery: Venice (previously Anno: 1404), but I am partial to Anno 2070 and Anno 2205 because I prefer the more futuristic settings.
They're city builders somewhat like SimCity or Skylines, but you're more hands-on in managing the territory. Instead of just zoning an area, you're managing the resources that the area mines, processes, produces, and sells or buys. The population has tiers with increasing requirements for items they consume in order to maintain their satisfaction level (which affects how many people of that tier are present, and therefore how much tax income you receive).
There is some warfare involved in the territory maps of Venice and 2070, but it is also possible to play "casual" maps where the opposing AI factions aren't aggressive and, while they may expand into areas you wanted, can be bought out without combat. In 2205, the combat sections are quarantined from the main "building" gameplay into their own maps. There are some points where you need to play a combat mission in order to advance, but even the three star maps are fairly easy, and there is no time pressure to complete them. 2205 also seems to do away with individual "scenario" maps. Instead, it is a single global area, and manage multiple territories more or less at the same time, moving between them more or less seamlessly.
A lot of people didn't like 2205, and I admit there were some things missing from it that I liked in 2070, but I'm okay with the changes. It's a similar game trying different things, instead of just the same game in a new setting.
About the only thing I don't like is that it requires Uplay. At best it is annoying if you bought it on steam, and it is simply yet another superfluous DRM platform. At worst it can be aggravating getting your Uplay account to recognize that you legitimately purchased the game via Steam.