Effusive
Unrestrained or excessive in emotional expression; gushy: an effusive manner.

Particular
Attentive to or concerned with details or niceties, often excessively so; meticulous or fussy.

Ebullient
Zestfully enthusiastic.

Temperamental
Excessively sensitive or irritable; moody.

Indifferent
Having no particular interest or concern; apathetic: indifferent to the sufferings of others.