Alexrd said:

To each his own, I suppose. I still think comparing a (weak) character like Grievous to a cultural icon like Darth Vader means nothing. Many people who don't know Star Wars, can recognize Darth Vader.

Not arguing with you there, but I'd be careful when using osmosis as a judge.

A bunch of furryballs known of "Tribbles" have made it from one silly (but fun as hell) comedy episode to being one of the most (or more) prominent Star Trek images.

Of course, "Klingons" are still better known... but.. you know...