Has to be the Pam 359 M Dirty Dial. It's perfectly sized for me at 44mm, is incredibly versatile and is rugged enough (with a rubber strap) to be worn whilst diving and smart enough (with a black croc strap) to be worn with a suit and casual enough (with vintage leather) to be worn with jeans that it could be all the watch I ever need.
It's legibility is excellent, with a simple, yet elegant dial and the date feature is something that is essential to me for any daily wearer.
The price isn't ridiculous and the reliability on par with the cost.
Then there's the providence of the brand which is just the icing on the cake.