Livejournal icons!
100x100
100x100 were popular back in the days of livejournal (as well as spinoffs like greatestjournal and deadjournal and xanga) They were also used all over the web, from forum icons to giant walls of icons on myspace pages
cute
fashion
food
neopets
world of warcraft
final fantasy X
final fantasy X-2
final fantasy XIV
other video games
animals
art