Long story short, to help people. Was always something that I was interested in, even from a very young age.
From an educational stand point? Yeah, I had to pause my EMT course (about 2.5 months in) due to student loan issues and then restart from scratch when the next EMT course opened up. If I would have done my homework I could have avoided all of that and just done it in one go. Besides that, no. Went to a great school and got a great education.
A lot. Do a quick google search and you'll find many routes you can take as a paramedic. CBRNE, Tactical medic, community paramedicine, flight medic, offshore oil rigs, remote medic, cruise ships, Paramedics without borders, etc etc.
As paramedicmike mentioned, there are really great opportunities for paramedic/RNs, mostly in the field of critical care and flight. Sit down at your computer and spend an hour or two researching the job opportunities that can come along with that combined education.