WHY DQ isn't popular in America

Hello!Nice to meet you.
I'm a Japanese.
Well...I have a question.
Why the Dragonquest (In America it called DragonWarrior) isn't popular in America?
DragonQuest is most popular RPG in Japan (than finalfantasy).
It's wonder for me.
WHY?
Could you tell me your thinking(opinion?)about it?

Sorry,Poor English.

A couple things I should add:

About FFVII: The JRPG genre was so unknown in the mainstream that when FFVII was released, a lot of people just blindly bought it on account of the (massive) advertising campaign, which showed nothing of the game except for the CG movies. A lot of these people were upset when they realized they'd bought some weird game where they have to walk around and talk to people and read menus and stuff, and angrily returned the game.

Secondly: the DQ8 demo is looking GREAT. I can't wait to play the real game.