You might have noticed that Facebook will soon completely remove application tabs from your profile. That means Poll app will be removed from you personal profile as well.
Now you will see this message under each application tab in your Facebook personal profile:
Application tabs going away
Soon, Facebook will no longer support tabs for applications. Find your favorite applications in the left hand navigation on your Facebook homepage.
Adding Poll tab to your profile
At the moment you can’t even add Poll application tab to your profile. If you try to do it you will receive an error (see screenshot below).
Note that custom tabs and application tabs will still be available for Facebook (business/fan) Pages. That means, if you are managing a Facebook Page you can still use the Poll or other apps in Page tabs.