Traits:
Yang
Active
Masculine
Dynamic
Hot
Dry
Fire
Heaven
Top
Right
Out
Long
Day
Sun
Up
Male
Tangible
Hallow
Materialize
Expand
Push
Offensive
Hard
Exhale
Alive
Happy
Tall
Fat
Open
Strong

For the opposites of this checkout the feminity page.
Also see: this and that.

For more information on this and other topics check out this site

Principles of Yin and Yang:
http://members.tripod.com/internalart/the%20art%20of%20healing/principle_of_yin_and_yang.htm