I find that shaved and trimmed can both be incredibly sexy.
The key is for the choice to look somewhat natural. If you are very hairy (chest, arms, legs) you should make sure that you have some public hair. The look is very masculine and carefree.
If you have a bit of body hair, shaved pubic hair could look great. The look is very sporty and young.
On the advantage of having pubic hair:
I have to say that pubic hair does tend to trap subtle odours that can be very, very sexy and a huge sexual turn on.
On the advantage of not having pubic hair:
You feel so many new sensation on your crotch and testicles as many nerve endings that are usually covered with hair are suddenly being touched and licked. Also you feel so much cleaner in the summer.
The person you are having sex with also has the advantage of totally exploring your testicles and crotch with their tongue and giving you much more pleasure. Shaving also makes your penis look larger.