Most flash games I have played (that I can find on this website)
Mostly newgrounds stuff

My trophy hunting days started here (well medal hunting in this case)

Some notorious games (for me) that aren't here:
Flash tennis
Dadgame
Cathode raybots
Djmaniax
Trigger knight
Randobot
Freeway fury 2
War of the web
Second wind
Apples in the tree
Freeway fallguy
Desutori
SCGMD
Chainsaw princess
Epic coaster
Magic pink man
... and probably more