Of all the bikes I've owned, only three carry nostalgia for me.
My Stingray, which took me from 1st grade to junior high when it finally broke terminally in BMX duty
The Univega Viva Sport that was my high school graduation present in 1979. First quality bike I ever rode. It was a revelation as to what a bike could be & do. Sold it to an undeserving toad who never even finished paying me for it.
1997 Specialized Rockhopper. Most fun bike ever. Retired with a cracked headtube after much abuse. A few parts are still in use on my beater bike.