G-Shock for sure.

The first one has to be one of my G-Shock or Casio A159, they alone could basically handle anything except when I want to wear something nicer.

The second one would most likely be my two tone Cartier Santos Galbee, I was surprised how versatile it is when I first got it, dress up or casual.

The final one depends on situation, maybe my Hamilton Khaki Field or Seiko Laurel Alpinist / diver.