Here are some breaks that I do:
1) Jeopardy
C\Eb,Ab(high)
F\Eb,Ab(low)
Bb\Eb,Ab(high)
Eb\Eb
2) Catdog
...\Eb
B,Gb,B\Gb
...\Ab
B\...
Ab,Eb,Ab\Eb
3) Old McDonald (I'll just post the bass for this one, since everyone should know the melody.)
Ab-C-Db-C-Bb-Eb-Ab
4) Sonic-the-Hedgehog
This one, I play the normal 1-5 bass with the melody from the bonus round on sonic.
I come out of all of them by doing a 2-5-1. I'll make a video later.