1. No Cheating
2. No attacking without a CB (Although rarely out of frustration I do... or mainly it's for the stability drop and I white peace out of it)
3. Everything is set to free, free spies, free missionaries, etc.
4. Historical advisers
5. No inflation, as I find once I bankrupt a nation like Austria or France it's no fun anymore...
6. No scortched earth. It's messy, cruel, and unusual for 6000 Naples troops to destroy 10000 French or Austrians completely while I have barely any casualties.
7. Build... everything. Just for the sake of building. When you have a large empire build, build, build.
8. Stay below the 1000 ducat line, except for missions.
9. Give war subsidies to Ming and Japan so that they don't shatter...
10. Have fun.