Which word describes a style that is enthusiastic and characterized by lively interactions?

The term that best fits a style characterized by enthusiasm and lively interactions is "expressive." This word indicates a style that communicates emotions and thoughts openly and energetically, often engaging others through animated conversations, body language, and enthusiasm. An expressive style is typical among individuals who enjoy sharing their experiences, ideas, and feelings, making interactions feel vibrant and dynamic.

In contrast, "reserved" suggests a more restrained demeanor, where individuals may hold back their thoughts and emotions, making it less likely for interactions to be lively. "Detached" implies a lack of emotional involvement or connection, which further distances individuals from the enthusiastic and interactive style indicated in the question. Lastly, "direct" refers to straightforward communication that may or may not be infused with enthusiasm but does not intrinsically imply lively interaction. Thus, "expressive" is clearly the word that encapsulates an enthusiastic and interactive manner of communication.