I liked the original grille-less Q with active suspension (I remember seeing the ads pictured with it taking a turn and the same turn in the Lexus LS 400). It was a quick Q-Ship!
Between then and now, I respected the QX4 as it looked pretty good to me with the cladding and amber fogs and HIDs. But was just a gussied Pathfinder.
The G20 was neat, but not all that luxurious nor powerful. Just a good handler.
Really, besides the original Q it's only been recently that I've liked the Infinitis. The G35 sedan looks good exterior-wise, I LOVE the G35 Coupe, and the new M-Series is awesome lookin' to me as well. It's a brand on the move! Today's Q they can keep tho. And the FX, while unique, is more useless to me than anything.