Didn't take car test til I was 25, always had bikes.
Only ever had 2 non Vauxhalls, a 1.3 Mk2 Escort (first car, bag o sh*te) (sold on)
Then i bought an 1.5 Austin Allegro and wrote it off with 12 weeks, after that it's been Vauhalls all the way
V reg 1.3 Chevette (written off)
3 X Mk2 1.6 Cavaliers (all scrapped)
5 X 2.0 Carltons (Gl, CD, CDX Saloons & 2 x GL Estates) (CD & CDX spectacularly written off!) (1 Estate sold, 1 scrapped) (1994 GL current)
So it's 11 cars in 20 years for me

Bikes (in order of purchase)
1973 Yamaha FS1E (Purchased 1977, Sold 1978)
1974 Yamaha RD200 (Purchased 1978, Sold 1980)
1976 Honda CB125J (Purchased 1980, Sold 1982)
1981 Honda CM200T (Purchased 1982, Sold 1984)
1973 Honda CB350K4 (Purchased 1982, Sold 1986)
1978 Suzuki GS400T (Purchased 1984, Written Off after 2 weeks, car pulled out on me!)
1982 Honda CX500EC (Purchased 1985, Stolen 1987)
1983 Honda GL500 (Purchased 1987, Sold 1988)
1978 Honda CX500Z (Purchased 1987, Sold 1990)
1981 Suzuki GS1000G (Purchased 1988, still got it after 17 years!)
1982 Honda CX500EC (Purchased 1994 (written off 97 yards from garage after buying it (yes I measured it!),Restored then Stolen 1997)
1984 Suzuki GS400T (Purchased 1997, Written Off after 2 months, car pulled out on me!)
1985 Suzuki GS250T (Purchased 1998, Sold 2000) (was bought to do a project with the 400, sold the pair)
1979 Honda CX500Z (Purchased 2005, Selling 2006!) Resurrected!
1980 Honda CX500Z (Purchased 2005, Selling 2006!) Resurrected!
So 15 bikes in 28 years, similar average to the cars, spooky, Looks like I'm a creature of habit LOL!