I really agree with Krayzie here, you can't please everyone and from what i know, a lot of people also like maps such as Ambush, and hate maps like Chinatown.
Also if you leave the rotation on just your favourites for extended periods of time, you will go and start to dislike them.
And don't forget that with certain maps, the number of people play on it also greatly influences the fun you will have.
For example: I really like the Countdown map when the server pop is low-medium, but when it gets high it can quickly become very frustrating to play on.