Home/Limit switches : Micro switches or optical interrupters?

I am slowly but surely progressing on my servo CNC conversion and I
have come to the question of limit switches.

Are most people using micro switches or optical interrupters to
determine their home position? What kind of repeatability in home
position is required/attainable?

Micro switches seem like they would be easier to implement while
optical interrupter probably have greater accuracy and no moving
parts. Right now I am leaning towards optical interruptors with a
small tang mounted on my table to trigger the interrupter, but
thought the list might have some thoughts on why microswitches are
the greatest thing since sliced bread.

TIA

-Erik Reikes