There are melodies that have that certain something. Like this one. I listen to that song quite often and it is always "fresh" and uplifting.
Drop DG (Capo II - sounds better in A)
Don't take the alternating bass too serious. I add some strums here and there to make it sound more lively.
A - Main Theme
B - Bridge
C - Outro Theme. The last five bars before Chuck Leavell starts noodling make a nice ending.