I am 41 and the total amount of cars owned equals 13.
In order:
'75 Camaro - was sister-in-laws and was given to me but never registered. Ultimately junked

'75 Pontiac LeMans - hand me down from parents
'69 Rambler - another hand me down; was my grandmothers
'84 Oldsmobile Firenza - bought from another sister-in-law; first 'real' car and drove it in college
'90 Pontiac Grand Prix
'94 Ford Probe GT - first brand new car
'00 Ford Explorer Eddie Bauer - first SUV
'68 Camaro RS - completely restored show car; still own it and plan to be buried in it

'03 Ford Explorer XLT - wish I never got rid of it
'98 Camaro convertible - bought as a fun second car but sold ir since I needed $'s

'08 Chevrolet Malibu LTZ - sort of bought it on a whim but just was not me ... traded it for ...

'10 Camaro 2LT RS - first car I ever custom ordered and plan to keep it forever

'93 Buick LeSabre - given to me by my mom and used as my winter beater
Note that there is not one foreign brand on the list!