I LOVED Rome, and wanted to watch it when I was 16. My mother did not allow me to, however, 16-year-olds can be more... advanced-thinking than one might believe. I was writing about this kind of violence/sexuality when I was 13, and I was NEVER allowed to watch stuff like this.
As an adult I have thoroughly enjoyed Rome. It's an amazing series, great acting. Lots of blood and tawdry humor... but if you like that kind of stuff, then you'll loooove this.