Adelfa, I was behind a guy in the line at Starbucks the other day who was making conversation with an acquaintance about how his tech company had recently been sold and he was in-between projects - meanwhile he's wearing an old t-shirt, flip flops and cargo shorts with holes in them. I mean, I'm not saying he had to be a millionaire, but it'd be a pretty good bet.
Rachylou, poor Tucson I know what you mean, though - my SIL is allergic to wool and she used to get me to buy her sweaters and coats because there'd be a wide selection of non-wool options in the stores here, but none back in Indiana.
I think I'm definitely influenced by weather and environmental norms but less than I used to be - I like to dress a little better than average (which normally just means not yoga pants or holey jeans) most days. As far as shapes and silhouettes I definitely follow the trends, though, mainly because of availability issues.