piercing the clit itself is fairly dangerous and rare b/c it can cause loss of sensativity etc....the hood on the other hand is fairly common. how much sensativity or pleasure you might get from the piercing is totally anatomy dependant. of the two, vertical vs. horizontal....many women report more pleasure from vertical as the ball tends to rest on the clit itself. another option is the "triangle" whichis a lot more rare and should only be done by a very qualified piercer...but it goes under the clitoral shaft. Its a gorgeoous piercing...a bit more painful (or so i hear) but the pleasure derived from it is supposed to be lovely.
i have a horizontal hoood, 2 high outer labias, and a christina...i get nothing from any of them except some beautifully adorned junk. that in itself is enough leasure to me b/c i am decorating one of my favourite body parts thus making me adore myself even more. my boyfriend says he likes the feeling as well so from that perspective i guess its good.
it hurts, all piercings hurt, its just fairly relative. i tend to think of it this way....for thousands of years people have been modifying their bodies in various ways, some more painful then others...if they can do it there is not any reason i shouldn't be able to. hell, i hear that birthing a child hurts but that doesnt stop women from doing it. pain has no memory, in 3 days you will forget it hurt at all and when peopel ask you will say "nnah, it wasn't that bad"...your little girl will be a bit sore for awhile but its seriously nothing that is so bad that it should detract you from decorating your body as you would like......they don't take too long to heal either b/c the area is constanly moist and cleansing itself....however, as i am sure your piercer will tell you, keep other peopel's bodily fluids awa y from it for awhile...
sorry if i have repeted what other people have said, i am too lazy to read
-jovana