I haven't many but..
* Facilitating the creation of Kumbahyah (not all my idea but I think I lit the flame with Tim H in 54mm before it downscaled and upsized into a while 28mm game with an ongoing campaign)
* Every big game myself and Tim H have done, Little Wars style in particular before it was fashionable

* Winning Best Demo game at Battlegroup North with a simple toy soldier game that was lapped up and loved by many young kids on a visit including a whole scout group.
* My 28mm WWII armies. Really the only stuff I have enough of to put a game on if someone came round.
Ohh more than I thought!