That's what I don't agree with, it's not really down to personal opinion. Defining character in cars is like defining character in women - to paraphrase cinematography - it's like dancing about architecture. Journalists tried to erect many cars to "character" or classic status throughout years - Renault Avantime, Vel Satic, Rover 800 Coupe or Subaru SVX thus mistaking quirkiness with character. Others insist on road presence, which is again misleading, as wimpy looking, anorexic BMW 2002 Turbo has more character than butch M6's could ever dream of. Character is not performace, as it's only Aston Martin, it's also VW Beetle. Car being a classic doesn't mean it has character. Pug 205 GTI is a classic, but it has as much character as an argos folding bike. Car not being a classic doesn't mean it has no character. Trabant 601 will never have true classic status but character it has. It's not exclusivity or classification. Between the two. Elise has it. VX220 doesn't. And for certain - it's not personal taste or opinion - most of us don't like old Minis, there is no denying they have character. Given a free choice, out of all classics very small number of people would reach for something like Austin Healey but it has character. I don't think you can nominate it, I don't think you can force it. I don't think you can choose car to gain character with time.
I understand depending on where we live, some of us don't see 3 and 5 series as asian/wigger mobile, someone here even said it's a "man in a suit" car, even though I have never ever seen man in a suit driving 5 series, unless by suit we mean suit from Sean Combs collection. Despite its chavy association I have no doubt M5 is a future classic. Character tho... I don't think it's something possible for it to gain and in general it doesn't really have it now, does it?