Observant
Part of speech: adjective
Definition: Alert and paying close attention. Diligently attentive in observing a law, custom, duty or principle.
Example sentence: I was a very observant child. The boys in my books are based on boys in my neighborhood growing up.
Attentive
Part of speech: adjective
Definition: paying attention; noticing, watching, listening, or attending closely
Example sentence: When you learn how to be really attentive, you learn the importance of patience and appreciating a woman. You're able to appreciate the softness of her skin and the look in her eyes. It's a connection.