Woman's perspective on a bigger penis?

My question mainly has to do with my girlfriend. It is kind of a touchy area to just ask her and expect the right answer. I have been sexually active with her for almost three years. She has always told me from the beginning that i have a really large penis. She will tell me that my penis is bigger soft than her ex-hookups. I sometimes get to wondering if this can be a bad thing. Only in the sense that it is hard for her in some sexual positions and also when giving oral sex. do you think  takes away from intimacy. We try to explore different things and alot of the time we want to do them and she can't. She tells me if it was any larger sex would not be enjoyable. Also another strange thing is i think it is done growing just took a little longer than reported but i was a late bloomer. I peeked at 10 inches, hopefully. Well anyway i wanted to get some opinions, like do girls like this or is it kind of annoying because i also read that you only need like six inch or less to get a girl off. My girlfriend does finish extremely fast though.