One thing I will say is this. I actually did like Saints Row IV more than The Third. The latter felt like it was trying too hard to be "wacky" and "zany", and it's new characters were completely weak and unlikable. IV on the other hand gave us some old faces back (like King and Gat), and the newer ones felt more fleshed out. I really liked the constant references to past entries, and the "entry logs" that gave the player more insight into the series' characters. And despite the idiocy of the alien invasion/simulation storyline, I thought Zinyak was a charismatic antagonist, though it's a shame he isn't really seen that enough. The gameplay as a whole felt more enjoyable, even if some tasks were repetitive.
Overall, I liked it far better than I thought I would. It held me over as a fun "guilty pleasure" game until GTA V came out and was a more satisfying experience than The Third, even if it did feel like more of an expansion pack than an entirely new game (you could probably say the same for SR2 to SR1, though that's a whole different argument). That said however, I didn't quite care for it enough to check out Gat Out of Hell. The sad thing is though that Volition could have used the resources to make a really badass and enjoyable (but standalone) superhero/alien game, but for whatever reason decided to attach the SR label to it.