I would say no to tiles if you are going to do anything other than park cars on it (jack stands will damage them eventually).
If you do use epoxy (very good when done properly) then make sure you add some sort of sand into the mix to make it rough for grip. The workshop floor at work was too slippery in the cash wash bay and it had to be redone within the first week of opening the new building due to cars sliding on the wet floor.
Just imagine driving into the garage after it has been raining and sliding into the back wall
Epoxy is fine when it's rough and laid right.