Most girls (me included) don't like heaps of hair down there on their guy, especially if they're open to giving dome (head). I say just trim it down a little bit because most guys are incapable of keeping it perfectly smooth (without regrowth) if they shave.
Also; yes we do like to see that you are CAPABLE of growing all that 'manly hair' down there... we just want to see it, tick it off and not have to worry further (
therefore trimming is best 
)