Not only that, I'm mainly DC but Daredevil is a favorite. I didn't/don't know the Jessica Jones character at all.
Every time I came across "ALIAS" I saw an artsy cover with an undefinable female face, that "MAX Explicit Content" logo and assumed it was a mature-readers adaption of...
I'd read a MAX title before and thought it was horrible (Punisher, I think). So I had no interest. And I don't remember any "heat" surrounding the title until the Netflix announcement. Now I'm really looking forward to the show, but yeah, I have no clue.
Edit: In my defense I point to the ALIAS logos. Somewhat similar, with TV it's the highlighted "S", Jessica Jones it's the odball "A". So I assumed Marvel had bought the rights and resurrected the TV storyline for mature-only. A dead-wrong-but-reasonable-assumpton (so I doubt I was the only one).
You are not the only one...I thought the exact same thing, and even when I read the New Avengers books a few years ago, I still thought it was the TV character, since I'd never watched the show either.
Funny thing is, since I assumed it for so long, it still lingers, even though I know better now. I think it doesn't help that it was a character that was retconned into continuity (as I understand it), so I don't know that much about the character to this minute.