Personally I prefer long phrases in melodies, not like those that come back to the tonic every second, is like they can not go too far from the back yard because they get lost, a few steps to the right and I come back, now a few ones to the left and I come back, now to the front and I come back again to the very same point... Come on, you can go further, walk for hours, or you think you will forget where your house is ? :P
Something like:
C, G, Am7, FM7,, Dm7, G7, Em7, A7,, Dm7, E7, FM7, G7,, Am9, FM7, Dm9, E7, only then C and the rest again.
.... Just a thought :D