Chiming in on traits: There's a brief line in Memory Alpha . . . "The Cardassians were known for their photographic memories, and some even had the ability to resist a Vulcan mind meld." Based on this, I went with Mental Disciplines (or I believe that's what it's called).
Personally, I also chose Soldier, Aggressive, and Efficient, for a variety of reasons ranging from racial to upbringing to personality.