Gameguy95's suggestions

a few thoughts i had about the game is that they should add:

Cross-Server alliances (be on the same alliance with your best friend from another server)

Being able to switch your account to another server

Private trades with other players

When you don't want a city anymore you can auction it off on the market to the highest bidder

Auctions on the market (say starting price at xxxx gold and go for whatever the highest bid is at the end of xx hours/days)

A "close account" button (for people who are REALLY sure they never want to play again. Maybe even Haypi can auction off their account to the highest bidder (coins or real $))

these are just a few ideas i had and i was wondering what you thought of them. I'll keep you posted if i think of any more.

Cross-Server Alliances - The point of an alliance to to be able to help out when needed. Can't really help out from a different server
Switch-Servers - This has been discussed and will probably never happen.
Private Trades - Too Easily Abused so it will never happen.
Selling a City - I actually like this idea.
Close Account - I like this one too, but most people who quit won't take the time to use it.