Don Quixote
Quixote
activist
addict
adherent
admirer
aficionado
amateur
ball of fire
bear
beaver
big-time operator
bigot
booster
buff
bug
bum
bustler
busy bee
champion
collector
crank
daydreamer
demon
devotee
disciple
doer
dreamer
dreamer of dreams
eager beaver
energumen
escapist
extremist
faddist
fan
fanatic
fanatico
fancier
fiend
follower
freak
geek
go-getter
great one for
enthuse
enthusiasm
enthusiastic
adventurer
artist
correspondent
critic
entrepreneur
journalist
lover
musician
patriot
photographer
reformer
researcher
scholar
theorist