I shoot--or have shot--just about everything non-professional at one time or another so it's impossible to pick only one category. I am a welder/fabricator/machinist by trade so I've always been interested in things mechanical--cars, bikes, boats, trains, working machinery, bridges, structures; you name it--so I shoot a lot of that. But then I do shoot some people; family and friends, a bit on the street sometimes. I'm also a pretty avid naturalist so I do drift that way from time to time--often on an "opportunity presents itself" basis. I live in a rural area so I have shot a lot of cows. How many cow pictures do you have? If shooting people in their environment is "street" photography then is shooting cows in theirs "field" photography? All I know for sure is that my photographic tastes are way too diverse to lump into a single category...