Marky is tactful and is often seen as lazy, often not caring what the other two cockroaches are doing. Although he initially enjoys causing mischief just like the other cockroaches, he becomes more relaxed in later episodes, though he still enjoys hanging out with Joey and Dee Dee and continues to cause general mayhem as he often does. At times, he got tired of Joey's controlling antics and sided with Dee Dee when he felt Joey was too assertive. He is sometimes depicted as clumsy and even dizzy, possibly a symptom of soda addiction as seen in the episode Baby Doll, although he is shown to be talented in many areas, including robbery, play mandolin/ukulele and drawing in the following seasons. He’s a hopeless romantic, and his hobbies include dating puppets and reading books (although it’s never shown in the series). He also has bad breath, as revealed in the episode It's a Small World and Itsy-Bitsy Oggy (how he can stand his own bad breath is debatable, as he couldn't stand the smell of gas in French Fries.)