Leigh, I agree that beauty is in the eyes of the beholder and that it changes with permaculture knowledge. Maybe there are "universal" aspects of beauty as well, but when it comes to plants, in gardens, in nature and on farmfields, my idea of beauty has shifted from one end completely to the other.
I remember how I used to think about what they "should" look like, but now, when I see one, I am horrified. I have found it extremely difficult to let weeds grow, and at times, I still do. The need for tidyness is so deeply rooted in my upbringing and probably my culture as well. I really had to learn to see the beauty of a messy ecosystem.
Today I am proud of my messy garden that provides my familly as well as birds, frogs and insects (and other critters), with so much food. The wild flowers and the wildlife cheers us up everytime we see them. However, my husband (and many friend ans family), are not at the same level of accepting the "eco sysem messiness" they need their time to get there. What really makes a difference: if the edges are tidy, the whole place looks tidy, to me as well. So my husband takes care of the edges. Edges are weeded and the edge of the lawn, which is slowly turning into a wild flower meadow, is mown. It does make the whole place more visual appealing to everyone.
So, I think our place looks great and so does my husband. However, my dad looked at my berrybushes in the cage, with groundcover and tall white flowers of a vegtable in between, nicely contrasting with the red berries, pathways clear to move around and neat edges, and said: "well that got out of control". I was so surprised. Same thing when I started to chop and drop in "syntropic farming" style: I really think the nicely arranged heap of biomass swirling through the garden, following the contours of my romanticly shaped gardenbeds surrounding the fruit trees, look great. I see reduced work, mulch, future compost, fungus feed and wildlife habitat. My husband looked horrified and said: "do you really want to keep it this way? I can help you clean it up." So I guess there are different levels, and there will always be. Beauty is in the eyes of the beholder.