Don Quixote, Quixote, activist, addict, adherent, admirer, aficionado, 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, fiend, follower, freak, go-getter, great one for, groupie, habitue, head, hobbyist, hound, human dynamo, hustler, idealist, infatuate, live wire, lotus-eater, lover, lunatic fringe, man of action, man of deeds, maniac, militant, monomaniac, new broom, nut, operator, partisan, political activist, powerhouse, promoter, prophet, pursuer, rhapsodist, romancer, romantic, romanticist, seer, sucker for, supporter, take-charge guy, utopian, utopianist, utopianizer, visionary, votary, wheeler-dealer, winner, wishful thinker, zealot