Mi familia es muy pequeña. Tengo dos hermanos y dos padres que viven conmigo. Mi hermano es simpático, alto, y usualmente está enojado....: My family is very small. I have 2 brothers and 2 parents that live with me. My brother is nice, tall, and he's usually mad.
Explanation:
I would use words like: simpático/a, bajo/a, alto/a to describe your family. Make sure to always use ser while describing their traits and use estar when describing their emotions.
The past tense is used to present actions as finished or completed. We present them as "historical". They present themselves as having no connection to the present.