A lot of younger men prefer women to be completely shaven or waxed. Many Therapists and those of older generations have speculated that it is a desire for the women to look adolescent or pre-pubescent which is not true for men who like this visual. These same guys either completely shave themselves or neatly trim as you said.

Many gay men fully shave their genitals and I often think it is based on images in porn where most men are shaved.

Sure, some women might groom their pubic hair thinking that it is what men want. But I don't think that gives enough credit to women who do things with their body for themselves, not for men. A lot of women groom their pubic hair for themselves. Personal preferences vary in terms of whether women prefer to be entirely shaved or waxed versus having some hair down there versus being entirely natural - and this might be influenced by a sex partner's preference as well. But women do report taking pride in grooming their pubic hair for reasons of it feeling cleaner, neater, and simply 'pretty' - just as much for themselves as for the men/women who may or may not see them.

Also, you do see the disappearance of pubic hair in pornography (both print and video). A study done looking at centerfolds of Playboy found substantial decline in the appearance of pubic hair. So it is certainly a trend that's being documented!

Since you are asking for opinions - I'm with you Paul. Pubic hair is a sign of sexual maturity which starts off in puberty, and my preference is for adults to keep a little of their hair. It just looks more natural to me. Nerve endings at the root of hairs cannot be stimulated if the hair is shaved, so with a bush, there is actually more sensation. But keeping it trimmed will still maintain this sensation. You should consider, however, that most people find it easier to lick surfaces without hair - so some men shave over the scrotum and any area on the shaft with hair. Similarly, women can leave a trimmed bush, but have hair removed over labia majora.