During development, I tried to have the out-of-the-box ORM layer handle as much of the queries as possible, essentially I used the Repository functions a lot:

For example, having a specific Repository extend the Doctrine EntityRepository and do something like:

 
    public function findByName($name)
    {
        $criteria = array('_name' => $name);
        return parent::findBy($criteria);
    }

Now all functionality is developed, I am optimizing performance and I find myself having to refer my Repository to my DAO layer which uses DQL, so I can enable the DQL Result Cache...

 
    public function findByName($name)
    {
       //Use the DAO so we can enable DQL ResultSet caching
        return $this->_getDao()->loadByName($name);
    }

It would be nice to be able to configure 'DQL Result Cache = on' on Repository level as well...