The Kate Daniels Series by Ilona Andrews
All-time favorite! This starts out as an urban fantasy, but morphs into a romance. The bantering, power-brokering between the hero and heroine is world class.
The Black Dagger Brotherhood Series by JR Ward
What’s not to love about the brotherhood of badass vampires? JR Ward’s gangsta’ style of writing is truly unique.
The SEAL/Troubleshooters Series by Suzanne Brockmann
Here is another author who really knows how to turn a phrase. Brockmann’s punchy writing and high-action plots always keep me engaged.