Personally I think "hophead" is not entirely accurate to describe someone who prefers bitter beers (strictly an opinion, here). There's such a wide variety of hops that are great for dryhopping or hopbursting that I think an affinity for aroma should be equal to an affinity for bitterness if someone were a true "hophead."
I agree. It doesn't have to be bitter at all. I prefer my IPA's to have very balanced bitterness and be late addition/dryhop bombs. I guess that makes me a hop head, but I also love a good malt forward beer.