enthusiastic

Synonyms: agog animated anxious ardent athirst attracted avid bugged concerned crazy about devoted dying to eager earnest ebullient exhilarated exuberant fanatical fascinated fervent fervid forceful gaga gone on gung ho hearty intent keen keyed up lively nutty obsessed passionate pleased rabid red-hot rhapsodic spirited tantalized thrilled titillated unqualified vehement vigorous wacky warm wholehearted willing zealous

Antonyms: apathetic disinterested doubting indifferent lethargic pessimistic unenthusiastic unexcited weary