I bought my first Kawasaki in 1973.
For bikes my favorite is my newest, a 2008 Kawasaki ZZR600- my 70s and 80s bikes were less reliable, vibrated more and had weaker power, braking, shifting and handling. The air cooling made me sweat more in the summer.
I still own a 2002 Honda Shadow 600cc cruiser, with the old style V-twin, 4-speeds, but newer water cooling, and about half the vibration of my previous 1978 Yamaha XS650.
For the dozens of bikes you have owned or ridden, which few stand out the most?
"He had never counted on anything except surprise and unpredictability and danger" from Lee Child's Bad Luck and Trouble novel (2007)---------------
"There's always the chance I'll screw up. That's what keeps it from getting boring."
from Dean Koontz's The Eyes of Darkness novel (1981)