AD is fine
Don't worry, Abu habi is fine. I have been living at both, DXB and AUH. I prefer the latest. It is quiter, greener and less stressfull. The big problems are schools and housing. Make sure it is fine for both. AUH is better for families (hope you are not alone). However, the bachelor scene is changing fast. Remember, those who live at DXB NEVER go to AUH. The opposite is not true. We got to DXB once a month for shoppoing or other activities, but we are always happy to go back home.
Enjoy it.