I want to get more mature in my shows but I still want to be classy, what are some shows that aren't geared towards kids but don't overdo it in sex or drinking?

You can never go wrong with classics like Andy Griffith, I Love Lucy, or Dick VanDyke. Another great show that's a little older would be Golden Girls. If you're looking for something more modern, you can check out my two personal favourites of Grimm and Sleepy Hollow. In the sifi genre there is Stargate SG1 and Stargate Atlantis; both of these are excellent shows and mostly clean, as well. If you would like something a little more gruesome and not as clean, then Hell On Wheels and The Walking Dead are excellent choices. Good luck my friend!