Another issue might be that while BRP is high in functionality, it is low in Oomph!.
And by Oomph!, I mean all the goodiness of HP, feats, levels, orderly character development, balance, godlike magical power, a multitude of setting books with nice pictures in them, neat dice mechanics(the last point doesn't apply to D&D, but to many other systems) etc.
When I sat down to create my first(and regretfully, only) RQ-character, I thought "what kind of stupid game is this?". Yes, I know, bring on the hurt. But I was young and stupid:o