1. I only played one for any time, something about building a zoo? I liked the animal facts. Most of the others have always seemed boring and often poorly spelled into the bargain.
2. I don't play because it's a time suck and I don't have the down-time, and because it clutters up feeds and makes Facebook even more obnoxious save those blessed few who make a separate account to do that stuff. Make it easily playable on mobile devices because no one wants to be chained to a full size computer anymore, except people who work internet-allowed desk jobs and are bored, but that isn't most people.
3. I'd like to stop being spammed with requests for a cow or to join Weed Farmer by cousins and aunts I never even talk to. Failing that, no preference :p Or can I be obvious and say I'd like something Castlevania-y? Something really well researched, anyway. Obscure myths and monsters, interesting pictures, text that doesn't appear to have been translated with a shoe.