Restore vs. Makeover

Hi all,
When I first planned my future airstream, I wanted a broken one which I could make into a "Rutgar Hauer" or MTV thing. A beautiful one found me that is in remarkable shape. I know there are many purists who beleive that everything has to be 100% original, but then again I don't think airstreams' motivation was to create the most 'beautiful' interiors. I don't plan to do anything 'to' it for a few months. I have to hang out in it awhile.
I find I am loving the thing as it is..all retro '70's and all with every material juxtaposed with each other, but it's very comforting in a cozy attic kinda way.
I went to Goodwill and got some cool '70's tumblers for it already..thinking about shag carpet (just kidding)
So, what I think I am asking is; "How far have you all pushed the original design enevelope? Were you happy you did or did not? What aspects or objects did you regret or thrill about losing or keeping? If you had to do it over, what would you change?
thanks,
--andrea