From memory, and it was a very long time ago (The E60 ended production more than 9 years ago!):
1x 530d M Sport for the day as some sort of dealer event back in 2006
1x 525i SE owned by my Dad about 10 years back
1x 530i 272PS and 530d 231bhp as test drives when I looked to replace the E39 in 2011
1x 535d belonging to a friend
Various 520d/525d as loan cars from my local BMW dealer when my E39 was in for bodyshop* and service work
*It went back a number of times before it was right each time a different loan car
F30 wise..
A couple of courtesy vehicles but mostly paid rental cars – we go on quite a few trips and I usually one-way a car to the airport and back again and book the Premium Auto class as for Heathrow it works out cheaper than parking. These are invariably 3 Series of some description up to and including 330d. Also had a German 320d once for a trip to Switzerland. I tend to get less these days as I actively avoid them, my last couple of ‘3 Series or similar’ rentals were a C300 Mercedes and an A5.
I believe this classifies as ‘plenty’ and means that my dislike of the E60 is not because I’ve never seen one. I’ve never liked it despite being a 5 Series fan – the looks are challenging though I concede looks are subjective – but the interior is poor and doesn’t meet class expectations, it doesn’t feel particularly well built, I could just never get on with them. The E39 was a better car in its day and the F10 a return to form. Such was my level of dislike I bought a 335i instead (Which didn’t go well either!) despite being far more of a 5 Series kinda guy