I had a hard time selling my old Peugeot but I can't say I regret it. Only so much room for stuff in the garage.
I know this probably won't be popular with this group but I dearly miss one car I had but I don't care much about the ones I've owned before or since. It was the first car where I had enough money to choose something I wanted and the last car I bought where practicality didn't trump fun.
Maybe once we're done paying for the kids college I'll be able to splurge on a bike I really want and I will get as attached to it as I did my old car. If along with some extra money I have some extra time to do some touring, that would make a difference too.