Kochira Katsushikaku Kameari Kouenmae Hashutsujo

While one is a teacher and one is a police officer, the protagonists in both of these series are roughnecks who are childish, fun-spirited, greedy, and a bit perverted... each show focuses on these characters getting involved in fun high-jinks in modern day Japan. If you like the antics in one show, you're bound to like the antics in the other. 

Both have over the top comedy with memorable characters and an awesome opening and closing theme.Both have episodes that teach good life lessons in hilarious ways.If you missed these two gems then you have certainly missed a lot of good stuff.