I'm similar. I never made a conscious decision, or said to myself "right, I'm never reading TechCrunch again," it was just something that sort of happened.

I gradually unsubscribed feeds in Google Reader that were generating too much uninteresting stuff, I stopped visiting sites, I got busy doing things of my own.. and before I knew it, I was tech-blog-free.

It's not like I know any less about what's going on in the world of tech without them; I just get a lot less clutter in my life.