I'd have to say that is a tough question to answer, there have been so many. Sad to say, I have sold them all as well.
Overall, I think it was probably my first black powder rifle. It started out life stock out of the box. Then I started to Hawkenize it. I got the Hawken Shop kit and updated the trigger guard and the rear sight. The butt plate didn't work too well on a Renegade, so a friend of mine and I made one and installed it. I also put an iron nose cap on it. At one point, I won an aggregate prize at a rendezvous and put that money towards a new barrel, a Douglas Premium in .54 caliber. It came I think as a 44" barrel so I cut 8" off and wound up with a 36" barrel. I swapped that into the stock and finally browned everything. It didn't look too bad, and did it ever shoot.
As far as use, it was mainly for target shooting and a rendezvous rifle, although I did take it deer hunting a few times.
Then one day, like a dummy, I sold it. Last I heard it was in Texas. Wish I would have made the guy promise that if he ever sold it, he would have given me first chance on it.
That's my story and I'm sticking to it.
John