I'm a huge nerd, so I have a spreadsheet that I use to track the mileage on all my bikes and the consumable components on them. I used to have a mental rule that if I went a full year without riding a bike I'd sell it, but then I had a couple that I really liked go unused for over a year, and I realized that was more of a guideline than a rule.
I just looked at the spreadsheet to see which ones I haven't ridden yet this year and was surprised to see several of my favorites in that state. They are:
1973 De Rosa -- This one I don't ride a whole lot because I keep mostly period-correct patts on it and that gearing doesn't suit me. It's one of the bikes that disproved the one year rule.
1975 Motobecane Grand Jubilé -- This is usually one of my most ridden bikes. I'm embarrassed to admit that I haven't gotten around to cleaning it since riding it at Cino last year, and the moon dust necessitates more than my usual brushing it off.
1975 Stella SX-73 -- I crashed pretty hard on this one last year and damaged the shifters and rear wheel. I've been meaning to fux it up, but with a stable full of bikes that are ready to ride, I just haven't gotten around to it.
1989 Cannondale ST400 -- I have a pretty good excuse for this one. It's the "zero bike" I keep at my sister's house in Maryland and I haven't been back there in over a year.
1972 Motobecane Grand Record -- I don't have much of a reason for not having ridden this one. It has fenders and I don't ride much in the rain anymore I guess.