I'd write spy and political intrigue novels like Ian Flemming's 007 or the Bourne series. Imagine! Me: Ian Vonnie. Do I hear a snicker out there?
I'd also write books about the Lost Generation in Paris after World War I until the Nazi's marched down Champs Elysee. Perhaps beyond the end of that war, as well. Set in the City of Love, of course there would be romance. Let's not forget underground jazz clubs, literature, and art--and the arguments of philosophy at sidewalk cafes, like Deux Maggots. I'd need a French name, wouldn't I? How about Von DeVeau?
I'd write a series of private investigators or a special government black ops band of elderly women. Think about it. Starsky and Hutch in girdles and false teeth. The government covert name could be "Gray Bitches."
No one pays attention to senior ladies. Think of all the mayhem they could create. Old women meandering slowly down the street with canes. Invisible to most everyone who has no idea these two old broads hold fourth degree black belts in karate and black belts in kung-fu. Are certified markswomen and wear throwing stars for earrings. I could write the series under the pen name of Ima Phool. Too over the top? See, that's what happens when my mind runs amuck.
But writing the books I'd like would require building a new brand. What few people who know me, know me as a romance writer of contemporary and paranormal romances. I'd have to start over with a new identity and zero fan base. I don't know that I have the energy. So, I'll keep writing what I know and enjoy. Although I would seriously love working on the above projects. But, then, who would buy them?