7805 capacitor question (again)

Yes... everything is +5v

I have bread boarded everything up and tested for weeks.... but when it came to using the actual correct cap values/types I wanted to get some feedback on some things.

1.) So many different 7805 diagrams..
2.) datasheet didnt show polarized caps.. so I wanted to ask if using electrolytic types would be a problem instead of ceramic disc types

No scope... (wouldnt now how to use it if I did unfortunately)