I wear whatever I feel like. Usually cowboy boots, which makes me really glad I bought those pad/gel things you put in your shoes to keep you from wanting to cut off your feet by the end of the day.
And I bring a pair of flipflops just in case I decide to do ride water rides.
If I'm not wearing cowboy boots, I'm usually barefoot, just sayin' lol
I also wear cowboy boots (big suprise, huh) but I wear Ariats that are built with running shoe technology. A little pricey (I think I found Ariat ropers for about $150 but your feet will appreciate them after walking on that asphalt all day!)