Oh man, this one's a toughie for me since I have multiple works, and multiple styles of music to go off when writing or drawing these guys. BUT, if I were to go off something I enjoyed that would be fitting for a theme song, it would go as follows:
2.) (The Adventures of) Jean-Luc & Joey:
3.) Sonia: Legends of Eternal Darkness:
4.) Mellisa & Julianna:
5.) The Little Pumpkin that Could:
There's a lot of stylistic music I use in my stories. Often from shows or movies I enjoy, but these are the more RIGHT THEN AND THERE choices that stick out to me. And boy do I have a blast when using them at the right time and moment.