Composing Songs

Which key should I put this song in? I sing in G Ionian/major comfortably, Likewise the relative E Aeolian/minor scale. Plus those guitar chords are easy as sin. I could choose a scale that’s more exotic - D Mixolydian has the same notes and chords. Hungarian or Roumanian minor, Spanish Gypsy. Or another scale derived from minor harmonic. Keep it simple – let’s start with the G Major scale. Should I do a basic 1-4-5 with major G/C/D chords? Or a jazzy 2-5-1 with A minor/D/G ending on the tonic? Let’s do a bluesy 1-4-5 with a turn-around at the tail! Just major and minor triad chords are boring. Major, minor, and dominant sevenths can be cool; But I’m rather partial to suspended seconds and fourths. My sliding E diminished flat 7th will keep the fans from snoring! What can I do to add even more pizzazz and glitz? Slowly build the dynamic and rhythmic complexity. Give the crowd a tribal chorus they can sing to. Add a spanking hot hook throughout that never quits!