My family doesn't any have particular brand loyalty, although my grandfather has always liked his Audi, a 1985 100 CD that he still owns but doesn't drive anymore. When my dad had his Honda Accord and later the Vauxhall Omega, Grandad would always say his car was better (even though it was getting old). He now drives a Peugeot 406. Before the Audi he had a couple of Jaguar XJ6s (a Series I and Series II) that he'd bought off a family friend, I was too young to remember those very well (I can't remember ever riding in them), but he still kept them sitting in his driveway and garage for years after he bought his Audi in the mid-80s. He never drove them, he's just an old man who doesn't like to get rid of things. He kept a battered old moss-covered Morris 1000 Traveller (the Moggie Thou') that was once used by my father in his youth rotting in his front garden for at least 25 years, in the end someone spotted it and offered to take it away, that's how bad my grandad is at getting things done! As for my other grandfather on my mother's side, he knows nothing about cars (he once accidently put weedkiller in one mistaking it for engine oil) so he's always had dull cars like Talbots, Hyundais and Mazdas. A couple of years ago he bought a new Nissan Almera, which is a terribly bland car (it's ancestor was the Nissan Sunny), he must have thought the same so after not too long he changed it for a Mazda 3.

My dad tends make his cars last, rather than many people who seem to change their car every few years, he's only had 6 cars in the last 23 years (we've always been a 2 car family). One of my uncles seems to have a new car every time I see him (which isn't that often, maybe once a year), he's not rich or anything, he keeps buying crap like Hyundais and other run-of-the-mill small cars, then later finds it isn't right for what he needs. You don't save money by frequently changing your car, he must have blown quite a bit of money over the years on his fickle car-buying habits.

Since I was born these are the cars my family's had:

1979 Ford Cortina MkV 2.0 GL (1984-1992, actually he may have bought this before I was born)
1982 BMW 520i [E28] (1984-1995)
1988 Honda Accord 2.0 16v (1992-1998)
1995 Fiat Punto 75SX (1995-2004)
1996 Vauxhall Omega Tourer 2.5 V6 (1998-present)
2003 Seat Leon S 1.6 (2004-present)

The BMW, the Honda and the Omega were my family's "main cars", the ones we'd take on holiday and other long journeys during my childhood, so I have deeper memories of those cars than of the Cortina and the Seat. The Seat is the car I have the least fondness for, I've haven't spent much time in it compared to the others, it's just the car my dad drives to work.

I myself have only owned two cars, the Fiat Punto mentioned above (my dad gave it to me) and a 1991 Renault Clio 1.4 RT which I bought in 2004 and had to get rid of two months ago.