Fancier

noun

1. One who has a special enthusiasm for or interest in something.

   "a fancier of antiques."

2. One who breeds a plant or an animal for those features held to be desirable.
3. One who fancies or has a special taste or aptitude: used of one who deals in objects of fanciful taste: as, a bird-fancier; a tulip-fancier.
4. One who is under the influence of his fancy: as, “not reasoners, but fanciers,” Macaulay.
5. One who is governed by fancy.