enthusiast
n. countablen. someone who is very interested in a particular activity or subject and spends a lot of time on it. You use this to describe a person who truly loves their hobby.
n. a person who is highly interested in and devoted to a particular activity, subject, or cause. While historically used to describe religious zealots, the modern sense refers to a dedicated hobbyist or supporter.
He is a classic car enthusiast.
The local hiking club attracts every outdoor enthusiast in the county during the summer months.
Despite being a lifelong photography enthusiast, she rarely shared her work publicly, preferring to keep her extensive collection of landscape prints for her own personal enjoyment.
From Ancient Greek ἐνθουσιαστής (enthousiastḗs, “an enthusiast, a zealot”), from ἐνθουσιάζειν (enthousiázein, “(intransitive) be inspired or possessed by a god, be rapt, be in ecstasy, (transitive) inspire”): see enthusiasm.
Often followed by the preposition 'of' or preceded by a modifying noun to specify the area of interest.