"balanced personality" is correct and usable in written English.
You can use it to refer to someone who is even tempered and composed, or someone who has a calm and well-rounded approach to life. For example, "John is known for his balanced personality; he always manages to remain level-headed in even the most difficult of situations."
William Phillips had the more balanced personality.
Dr. Murray concluded that Hitler had these characteristics (and others) to an extreme degree and lacked the offsetting qualities that round out a balanced personality.
"Everybody that is able to achieve something extraordinary doesn't necessarily have a balanced personality to start with," says Dr Filippo Ongaro.
Now a couple of companies are seeking to exploit Henry's smart and balanced personality and introduce him to a wider American audience.
The students undergoing interdisciplinary vocational programs in fashion and allied subjects are required to develop an open mindset and balanced personality for effective learning in order to face the challenges in the dynamic real life fashion environment.
My featured interview guest is creative, sharp, and competitive but embodies a balanced personality with compassion, gratitude and sweetness.
Longstanding professional string quartets are delicate organisms, in which egos must be balanced, personalities meshed and artistic compromises reached.
It's very much about psychology, balancing personalities and discovering needs.
The decision could affect the composition of Mr. Obama's overall national security team as he tries to balance personalities and experience.
This would be the smart way to go, if you buy into the conventional wisdom of how to balance personalities on the ticket.
What we call chemistry between two lovers is the unconscious matching of perfectly balanced opposite personality types.
