I have also taken the first aid, infant/child CPR, adult CPR and AED. It's like taking taking basic arithmetic, and geometry and finding out if you really want to do anything useful you have to have trigonometry and calculus.

I'm not positive, but I'm pretty sure there are certifications that get you in all 50 states. Might want to look into something like that if you travel alot, or may move. That way you can actually do something.