I think occassionally it is possible to unpick the patriarchy/capitalism/institutionalisation/etc.-influenced parts of yourself, but it takes a lot of honesty and self-awareness. I think they can be identified by a kind of uncomfortable feeling about them, like there's a sort of conflict going on.
An obvious example would be me shaving my legs and all the time I'm actually doing it, wishing I bloody didn't have to!
And I've listened to mothers who, after talking for nearly an hour about their experiences, being to realise that they are suffering with post-natal depression not because they're breastfeeding, but because they're trying to stop because everyone is telling them that the breastfeeding is causing the PND.
A less obvious example would be the fact that I went into nursing because (I now know) my family used to say 'ooh, you'd be such a good nurse!' and my mum was a nurse. I didn't work hard at my degree and, while I enjoyed it, I didn't love it, and didn't ever feel quite right about it. So I believe now that that wasn't really 'me', as it were...just the influenced bit of me.
I feel very strongly about this issue, actually, and, consequently, DH and I work really hard to try to minimise any influences on our children's personalities and likes/dislikes. We try hard not to say 'you'd be really good at...' or 'you really enjoy...' or to be overheard talking about them - we don't do a very good job of it, I have to say, but probably better than we would if we weren't trying not to IYSWIM. But I really want to create an environment where our children can grow into the people they were really meant to be IYSWIM.