1.Colony-Multiplayer 2.Sonny 2-Classes, cool moves, waitin for sonny 3. =) 3.Unreal Flash 2007-Haven't played it in a while but still...great game. Unreal Flash 2009 or 2010 would not likely come out I guess. 4.Platform Racing 2- Another multiplayer game that is great! 5.Crush the Castle- Players Pack- You can build your own castles.
Age of War 3, to me, was incredible because of the enormous amount of movement involved in the game. Also, any of the gemcraft games are excellent and I'd rather refer to them not only as flash games, but as a story-lined PC game due to it's length.
Gotta say... as of now 'Endless Migration' When I first came to this site it was 'Warfare 1917' About 4 months ago or whenever it came out I was addicted to 'Colony'. All-time favorite, 'Warfare 1917'.