His monomania about Gates is also thought to be the motivation behind his regular attempts to buy Apple Computer, whose Macintosh operating system is the only real rival to Microsoft's Windows.
His three divorces and fondness for fast cars are standard issue for a Silicon Valley billionaire, but even Bill Gates doesn't fly his own MIG- 29 jet fighter.
After dropping out of university in the late Sixties, he headed to California and Silicon Valley, where he worked as a programmer - and smoked the occasional joint.
One of his other well-known quotes is that, unlike Bill Clinton, he did inhale.
Nikita Kahn is a Ukrainian actress and is dating Larry Ellison, the fifth richest man in the world and co-founder of Oracle Corporation, a software development company that specializes in cloud and networking technologies.
Ellison has an estimated worth of more than billion and has been married four times. Talulah Riley is an English actress and the on-again-off-again wife of Elon Musk, the Canadian-American CEO of aerospace company Space X, co-founder of Paypal, and product architect for Tesla Motors.