Here were the categories - subcategories I used.
#1 B & W - People (formal or informal)
#2 Color - Waterscapes, seascapes, waterfalls, water
#3 B & W - Nature (plants, insects & wild animals)
#4 Color - Waterscapes, seascapes, waterfalls, water
Laura thought I should put the last one of the beach in the "alternative process" category, but I wasn't sure expired tungsten balanced film + old box camera + nearly depleted room temperature C-41 chemistry = alt process. I guess it isn't really mainstream either though. That was the hardest one to categorize. I finally decided that no one could really argue with 'seascape'. They might try to get me to admit to digital manipulation, but I can always produce the negative.