Hop-head

[Sonia]

Someone who enjoys really hoppy beers, or drinks hoppy beers exclusively. Most likely this person is a beer-geek or craft-brew drinker.
Hops are what give beer the Citrusy, Piney, or sometimes what bring out the Herbal or Fruity flavors.

[Julian]

One who habitually uses hop or opium. Also hop-habit: opium addiction.