How you feel about an opening is very dependent on your overall positional preferences as a player; so if this 'feels' passive to you then fine, don't play it (I don't either, as I don't enjoy facing the Keres attack). However, as others have pointed out, to suggest it is objectively passive when so deeply established in theory and chosen by so many top players, is perhaps pushing it.
I agree with you here (depends on preferences), and I also might be pushing it a bit, but what I wanted to know was (to the people who played this before) is what they feel the opening is like.
Is it counterpunching? Solid? stuff like that.
SNUDOO - Why don't you read "The Sicilian Scheveningen: Move by Move" and 6 months later, when you're done, you can admit that your assessment was wrong.
I played the Najdorf for about a year, and often times, the Scheveningen lines (6...e6) rather than the pure Najdorf lines (6...e5) and very briefly I played the "Modern" Scheveningen (No ...a6).
While I may be more of a French guru than a Sicilian expert, I have played it long enough to know that the Scheveningen is not passive what-so-ever! Can I tell you the latest novelty on move 21? No! But as basic as passive vs not passive, I can assure you, the Scheveningen is NOT passive!
I'm not going to buy the book you said, not because I don't want to know why (I do), but spending money on my 11th opening book when I have 13 just doesn't suit me. In my experience (from white) I've found the Scheveningen structure a tough nut to crack; in a recent daily game, I played the Keres Attack against my 2000-rated opponent and lost. For me, attacking the Scheveningen feels like throwing myself into a wall face-first repeatedly, which didn't do anything for my suspicion that it was a passive structure compared to other sicilians.