As far as my preferences go:
Comics, DC. I was a big John Byrne fan and enjoyed his runs on XMen and Fantastic Four - and I read Xmen pretty religiously during the 80s, before they turned to crap.
But, otherwise its DC for me, Superman, Batman, Green Lantern , Flash- I just prefer the DC characters.
Animated: DC by a mile, their animated films and series are much better than Marvel's.
Live action:
Big screen = the MCU formula works for me, its cohesive and IMO has created a much better mythology than the disjointed approach DC has taken. It's so hit and miss - I liked Shazam, Man of Steel and Wonder Woman. Justice League was okay as was Aquaman but B v S and Suicide Squad were
. Does Joker even count ?
The MCU is a very different story. For me, it's so well done that even characters I didn't like - like Cap, I used to be a big Cap hater - I really enjoy their films ( Winter Soldier and Civil War are on my top 10 list of cbms) I mean, I could care less about Ant Man but his films are great fun.
Spider Man films ? I'll go see them but Spidey's far from my favourite superhero.
X-Men films ? Enjoy them, but nothing could do the classic Xmen stories justice ( like late 70s early 80s).