While he originally used to love causing mischief just like his brothers, he has grown to be more laid-back in later episodes, though he still enjoys hanging out with Joey and Dee Dee and causing general mayhem like he has always done.
However, in more recent episodes, Oggy has been portrayed as heroic, often triumphing over the cockroaches despite the beatings he takes from them and Bob. In early episodes, Oggy, like his "predecessor" Tom in Tom and Jerry, was the main punching bag in the series.
According to executive producer Marc du Pontavice and France Info, the character of Oggy was named after punk rock musician Iggy Pop and the rock album The Rise and Fall of Ziggy Stardust and the Spiders from Mars. Oggy's house appears bigger on the inside, mainly featured in the roller coaster-like staircase scenes. Whenever he finds himself alone in his house, he will eventually begin to miss the cockroaches along with their pranks (as seen in the episode "Priceless Roaches","So Lonely" and "Alone At Last") followed by nothing interesting happening in his life. Despite the constant mayhem caused by the cockroaches, Oggy has developed a sort of love–hate relationship with them, having lived with them for a long time.
Oggy usually spends his time either watching TV or doing housework - when not chasing the cockroaches.