I'm by no means a DC fan. I dont' like the movies, I can't stand the comics (other than the recent Absolute stuff which has been pretty good), and some of the animation is great. I've always been a Marvel Comics fan.
That being said, Superman was fantastic. other than 89 Batman, Batman Returns, and Dark Knight, this is easily my favourite DC movie.
What I like about this film is that there's no damn origin story which I'm so tired of in comic book movies. It's essentially just some text on the screen before the movie starts. It doesn't hold the audiences hand as you SHOULD know who Superman is. And what I also love is there's no big 'oh my god' reveals. I loved the way they just casually dropped Supergirls name as though you should already know and then her appearance at the end is just so casual. I love that. It felt like a comic book in that regard. Even the justice Gang it's like "yeah, you should kinda know these people exist"
It was funny, it was campy, It's just a fun movie and if Gunn and DC continue with this and STOP doing reboots when things go slightly wrong then it'll be a great and refreshing comic book cinematic universe. Just keep everything fun.