They are always entertaining. He's just a really cool dude. He'll always try to help people or do the right thing, the fun part is seeing HOW he does. You can put him in all sorts of situations. There are comics where it's nothing but Clark being a reporter and telling a story that he's investigating, or bringing food to impoverished nations and dealing with the way governments fear his intervention.
He's inspired the Legion of Superheroes way the hell in the future, an entire supporting cast and group of friends for him to interact with and make time travel stories fun, in addition to goofy antics in Smallville and at the Daily Planet.
A lot of his stories are just about what lengths he goes to in order to save or help people in the face of danger, or even certain death, like All-Star.
Secret Origin is all the classic Superman elements in a nutshell, going from Superboy to Superman, meeting the Legion, getting a dog, inspiring people and finding problems that he can't just punch.
New52 Action by Morrison is a cool homage to the Golden Age at first with a slightly cocky, rookie Superman and he gives some great insight as to how Clark disguises himself. I view Man of Steel an
For the Man Who Has Everything shows what it's like when a very calm, collected Superman has his mind toyed with and friends brutalized in front of him. Even more fun than that, it shows that Superman is just like us and meets up with his friends on his birthday, except it's in his fortress, not his regular apartment.
I like Man of Steel and BvS because I just see them as Elseworlds where Clark wasn't lucky enough to get minor challenges in his first superhero outings, and always has his back against the wall.
Even stupid shit like Injustice is worth sitting through just to see Superman finally come through, tell the bad guys to knock it the fuck off, and take out Regime Supes.
Birthright's kinda poopy though, but this is just about more notable ones in recent years.