I voted "Yes, all forms of service."
I'm hoping what you meant by that is that it would be an option. As in, you get to pick which one you want. Everyone isn't cut out for military service and I don't want to see an USA where everyone is required to join. It would change the face of our nation way too much and in a negative way, I think. But if you spread the options out enough it would work out really well, I think.
Police officers, firemen, military, peace corps, and hell, even parking authority would work. Basically anyone being paid by City, County, State, or Federal funds. It would allow people a choice that fit their education/religion/whatever. You also wouldn't have as much of a backlash if people were given fair options.