For me, it's 95% personal, 5% environmental. I just don't really like make up, I have my own sense of fashion but it includes wearing whatever looks good on me until it falls apart, not until it goes out of style, and I don't like spending a lot of time or money on my hair. I can justify these things by saying that being a minimalist reduces the amount of pesticides, oil, energy, sweat shop labor, chemicals, etc, that I am responsible for supporting, but really, it's just my style.
I tried to have a homebirth but ended up in hospital (still, no medical pain relief), I cloth diaper (or re-usable nappies as we call them here in the UK), try to eat organic and reduce packaging, PLAN to grow some veg now that we finally have a garden, don't use chemical cleaners/shampoo etc, I'm not vaxing or circ'ing, I would never CIO, I co-sleep, I'm b.feeding past infancy, all of DS's clothes and toys are second hand or gifts, and I couldn't be less interested in TV and material things. I live in a comparatively 'crunchy' area of the U.K. but there is still a very large 'middle-class' contingent that is pretty consumerist and so on, and in terms of parenting I am definitely on the way crunchy side of the continuum in my city (I'm one of very few who CD, and who still co-sleep at one year of age).For me, it's just 'normal' to be crunchy, I can't imagine it any other way.