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?
"Until he reached thirty, Randy felt bad about the fact that he was not socially deft. Now he doesn't give a damn. Pretty soon he'll probably start being proud of it." from Neal Stephenson's Cryptonomicon novel (1999).