I love them both and have no preference.
I loved Maine Road because it had history and its where i first watched City with my father and grandfather. Its where I first saw Peter Barnes and Paul Power play (the heroes of my youth). Its where I saw people run on the pitch and kiss players and also where I saw a man pull his pants down and show his arse to Eddie McGoldrick, which my 8 year old sister thought was hilarious. Its where I went with my friends without my parents as a young teenager. Its where I first drank beer. Its what kept me linked to Manchester when I first moved down south. Its where I made friends when I first moved down south, exiled city fans living close to me became my circle of friends.
I love the Etihad (and the name is OK, I could not have stomached a name change at Maine Road). Its where I went with my dad as he became progressively ill and heading towards the end. Its where I saw that QPR game. Its where me and my dad saw us win the league in 2014, his last trip to see the blues, his last trip anywhere for fun (trips to the hospital and doctors dont count).
To sum up, the stadium doesnt really matter, its structure or its name. What matters is the team and the people who watch them. Its the community and the friends we make. Its the link to your loved ones and the memories that the team bring back of those we have lost. Its a link to our city and sense of our own personal history. Its us, the fans and the team, are all that is important in football.