Breaking my waiting until the last moment rule, I'm butting in early to just say this. Sorry I got carried away on the favourite drivers thread but I have the same problem (or attitude) to cars and have some difficulty chosing a favourite because there have been so many over the years. What I can say with certainty is that my faourite is a type of car rather than a particular make or model. Simply put, every car that has ever broken the mould in terms of innovation, exploitation of the regulations and generally pushing the boundaries of engineering and aesthetic design has been my favourite.
Some may not have won a race. Others never made it into a race having been banned for "going too far". But, if I really had to pick one then it is the Adrian Newey designed Williams FW14B. Coincidentally, like his current RBR the power house was a Renault mill
. At the time and and even today it could be said that the FW14B was the most advanced F1 car ever built (although the FW15C should perhaps lay claim to that title) since it had all the gizmo's that were banned ahead of the 1994 season - and it had our Nige in the saddle (so that's most advanced package, then
). Although some of those technologies resurfaced from time to time it can safely be said that F1 reg's have not since allowed all of them back at the same time. The FW14B (with Nige in it) might not have been the prettiest but it was the trickest.
Having said that, I have slavered over every single one of Colin Chapmans' Lotus cars, especially late 1970's "John Player Special's". I'm a tech' freak and make no apologies for that, I'm afraid.