No. I read from every publishing companies. Dude, you don't know what you're missing out on! All of those publishers have some of their own best stories. Give them a try. You won't be disappointed!

I used to be a DC-only reader like you, but then I took an arrow in the knee.

What I mean with that is, I now read things from other companies too, but occasionally.

I mostly started reading other companies because of writers, like Millar or Gaiman, then because of some stories that seemed good (like that anthology comic about a car and it's many drivers through time, or second coming that was supposed to be in vertigo)

And that's perfectly fine, no one should be able to tell you what to read or who to like, we're merely expressing our opinions.