I regretted the move as soon as I got home on the GSX1100F I p/xed if for. The deal was done at Carnells, who offered a 7 day "no questions asked" return if you didn't like the bike - they wanted a grand to give me my Guzzi back ! In the end I took a 2 year old XJ900F instead, though that lasted less than a year in the garage. Should have kept the Guzzi - which seems to have been exported according to the DVLA records. Probably been buggered up by a hipster now, as seems to be the sad fate of many Guzzis.
If "favorite" is the one I have owned the longest, that would be my MZ TS250/1, which appeared in the garage 30 years ago this week & will still be in the fleet when I pop my clogs.
Honourable mention to my Indian 350 Bullet (but not the 500 I bought a couple of years later) - sold to make space for a Ducati ST2. The Ducati had to go when I became physically unable to ride it any distance due to ongoing hand issues.
Contemplating getting another Bullet, as I miss the experience.