#enthusiast__partisan__partizan  an ardent and enthusiastic supporter of some person or activity
  supertype:  #supporter__protagonist__champion__admirer__friend  a person who backs a politician or a team etc.; "all their supporters came out for the game"; "they are friends of the library"
  subtype:  #freak__addict__nut  someone who is so ardently devoted to something that it resembles an addiction; "a golf addict"; "a car nut"; "a control freak"
  subtype:  #backslapper  someone who demonstrates enthusiastic or excessive cordiality
  subtype:  #balletomane  a ballet enthusiast
  subtype:  #fanatic__fiend  a person motivated by irrational enthusiasm (as for a cause)
  subtype:  #gadgeteer  a person who delights in designing or building or using gadgets
  subtype:  #shutterbug  a photography enthusiast
  subtype:  #sports_fan__fan  an enthusiastic devotee of sports
     subtype:  #aficionado.sports_fan  a fan of bull fighting
     subtype:  #railbird  a fan of racing who watches races from the outer rail of the track

No statement uses or specializes #enthusiast; click here to add one.