I was going to to do the same thing and planned it out for a while.
After all, I decided I didn't want to pay 25$ a year for people to think I was clever.
Here is my list and a link that will help you.
NEWTON3 physics joke
F MA same
OBEYSPD
OBEYLMT
9SUBST2 'german no sound like 9' substitute porsche phrase
G2G FST
RLY SLOW
SPD LMT
NADA911
TWISTYS
TURNZ
https://www6.hsmv.state.fl.us/mvcheck/platecheck/main.jsp