My experience has been that although I reach orgasm more quickly (and consistently) through masturbation, orgasms from intercourse are much more satisfying. I am sure there are several reasons for this (at least one being that I am monogamous... husband only!), but for me, masturbation is more like a "quicky" and most of the time, intercourse is deeply satisying (I am sure for many of the emotional reasons stated). It is really like two different experiences for me.