Line Rider. Cursor*10. Just two examples of amazing ideas, that will or have reached millions of views. Simple concepts, but well done and clever. And look how that pays off: Line Rider reaches over 25 million views, the beta still receiving thousands of views a day. And just search for Cursor*10, people are already calling it the big Flash game of 2008.
Oh I almost forgot, FPA: World 2 came out. Apparently the creator spent something like 2 years making this, and although it got a better score than Cursor*10, think of the amount of hours spent on each one. It's still obviously a fantastic game, but you can almost cringe at how long it took to make. And the code is probably as ingenious as Cursor*10's concept, but it doesn't pay off as well.
PALADIN: the Game was great, but it wasn't a success. It was chunky, it could have been so good, but it was too much work for 2 people. And that's where I come in to say this:
Flash games should be simple and clever. You don't need to spend hours of time working on an RPG, that's what video games are for. A brilliant concept always wins, even in video games (think of Portal). I have decided that my games of this year are not going to be super ambitious, they will (hopefully) be simple and clever. Even if the hours spent thinking take as long as the hours spent coding an RPG, at least you can think in the sunshine, not have your eyes bulging in front of a screen.