^^^^ Firefly for sure. That's about as light-hearted and fun as it gets while being high quality and without being silly. Sadly, there's only one season of that

It's possible you may also like Freaks and Geeks. I'm skeptical though since it's similar to SFU even though it's more light-hearted. FnG is def top ten non-comedy series

Maybe go with Rome. It's got some srsbsn going on though so that might not be the best option. Its main character, Lucius Vorenus, is even more badass than Omar though (unpossible right?)

Maybe try the first three seasons of Oz. I quite enjoyed that show because I enjoy watching other people getting fucked up other than myself, and the first three seasons are actually pretty good. Don't bother finishing it from fourth and beyond though. The third season ending was the real ending, and it just goes downhill hard after that. If I had stopped watching with the finale of third season I probably would remember enjoying Oz much more

It's hard to predict how shows will affect you. I know that when I'm not feeling on top of my game I enjoy watching bad shit happen to other people instead of myself, but that doesn't sound to be the case for you. If you're similar to me in that regards then Sopranos would be a good option. It is also srsbsn, but only inasmuch as the characters are all criminals that you're supposed to start feeling for, and it does have some excellent comedy relief with Paulie and Silvio and others. Paulie's easily top ten funniest television characters, but I think part of his awesomeness comes from him getting limited screen time.

I would like to add that I completely understand emotional and stressful issues involved with cinema. As an example: Before Sunrise was one of my favorite films, but I had to shut off Before Sunset only five minutes into it due to personal issues that made the viewing just too difficult. I've only watched maybe three movies in the last year due to being agitated enough that I know I wouldn't fully enjoy them. The only types of films I can enjoy right now are things like Aliens or Spaceballs

I'm so fused now that I'm not even watching Dexter or Entourage. Shit I have like ten episodes left of Battlestar Galactica, but am not even finishing that. I don't even like that show, but watched it due to loving sci-fi and wanting to be able to make fun of how much the writers fucked up what could have been an amazing story.

Not sure if you watched Arrested Development, but that's pretty damn light-hearted. It's also what I consider the absolute best writing I ever seen, but I don't rate comedies along with dramas so I usually just claim that Wire or Carnivale are best. The thing about AD is that if you like it, you'll think it's literally perfect. It's on just another level, and the more times I rewatch it I realize exactly how epic the writing really was. I'm a pretty funny guy, I could probably write a few episodes for shows like Sunny in Philly, South Park, or Family Guy if given the opportunity, but there is no way in hell I could write the kind of insane quality that is Arrested Development