If you're still looking for views............ I'd say take a look at pro adverts.
Not many start with "Today I am selling my lovely 35is! This is BMW's flagship Z4 featuring the 3.0L N54 Twin Turbo engine paired with the lightning fast 7 Speed DCT box! " etc.
De-personalise it and make it factual. Potential buyers will scan through listings until they find something that hits their mental checklist - this is your chance to stop 'em dead and make this the advert they want to stay with and read more - not have their eyes glaze over and click "next".
The car may have once meant all the world to you (and will probably do so again to it's new owner) but a "For Sale" ad isn't the place to drag it out.
Plenty of pix is OK by me, but I'd concentrate on the essentials first ie side on, front, rear then 3/4's. No need to repeat them all with the roof in up/down mode, just a couple perhaps with the roof up. Good idea to show detail shots - with the passion you obviously have for this car I'm surprised there's no shot of a clean engine bay or boot area. Showing the history file is good, I'd have shown both sets of keys in the same shot.
It's a great looking car in a popular colour and the photo's suggest you've obviously cared for it, but as others have said we're in a bit of a niche market at possibly the wrong time of year. Everything sells when the price or circumstances are right.
I mean all of the above in a positive manner. It's a beautiful car - good luck with the sale.