Tough to pick one. For color, painted bunting, but have never actually seen one (not native to area). Baltimore Oriole is another, and have seen two of them. Also spotted a beautiful bluebird on the lawn down in East Texas.
For personality, the blue jays in my back yard. They fly down in the mornings and perch on the stacked pile of wood, allowing them to catch sight of us at the breakfast table. Then they start their characteristic chortle until we toss out bread or saved pieces of pizza crusts for them.