i'm one of the 10% chinese who are circumcised .Was done at 9 years old at General Hospital due to tight foreskin.

few things to consider :-

Circumcision method : anyof these 3 less blood and better looking & heal faster
1) Laser
2) Sunathrone (google & see the gallery on the Procedure)
3) Taraklamp

Not recommended
4) Free hand (like mine and muslim style) more scarring & blood.

Circumcision style
1) Tight - cut more skin (US style - have to use lubricant to masturbate)
2) Loose- cut less skin (recommended so that so that some skin is left for masturbation) Mine is loose type :- go to www.circlist.net for more info

Pros ;-
ex GF's chinese &malay like it for blowjob coz clean
More staying power - do not shoot too early.
Head is bigger and make it more pleasurable for sex.

Cons :-
Head become numb especially cycling and long rides on motor makes the head "kebas/numb"

During hot water shower the head is sensitive coz no skin to protect.

Masturbation is less nice unless got lubricant .

what I read was, some guys might experience the tearing of the foreskin during sex and this will make it a painful encounter . My classmate also encountered this... Only was to know is to ask guys who had sex before/after circumcision. which feels better..