Ballmer completed the deal on Tuesday after agreeing terms with Shelly Sterling, the wife of disgraced former owner Donald.
Sterling himself fought against the sale after being banned by the NBA, and although he is still expected to appeal, Ballmer is now the official man in charge.
On Wednesday, Ballmer told ESPN: "It's very, very exciting. I'm a basketball nut.
"I've got time. I love Los Angeles and the notion of spending a lot of time in Los Angeles has been exciting to me for years. The community down there is great.
"My job has been to complete the deal and there were a lot of people, including me, working on it for a long time. It was itchy for a while but I'm happy that things are now in place."
Former Microsoft CEO Ballmer first bid for the Clippers back in May.