getting a design and 3dprint spot on, first time.
My dogs.
Most of the other stuff people already mentioned.
Creating a new recipe that really works.
Watching a bunch of people enjoy food you've cooked.
Beating dave and pete in Mallorca - hell, beating ANYONE in mallorca
Making something that you know is unique - My portable sling target is a good example.
A good sauna/jacuzzi/steam session and lunch in the carpark watching the birds and squirrels and knowing nobody can get hold of me for a while.