Top of my list would be a .54 cal Flintlock, full-stock rifle. I may order a Kibler kit and give it a try, but I'm still looking.
Next, I've got an irrational itch for a 44 Mag rifle. I had one. It became useless, but the idea still appeals to me. I keep hoping the gun fairy is going to dump either a Ruger Deerfield or a Model 96/44 in my lap, but so far . . .
see
And I Can't Get it out of my headThere's still a Marlin 336 in 30-30 sitting in my safe from a project that is yet to be completed. I'm most likely going to send it off for reboring to 38-55 for an Ohio-ready deer rifle, but I keep putting it off.
Next on the list is some sort of .308 Win, possibly in carbine length. I have only one .308 WIN, and it doesn't like military brass. Meanwhile, I've got a pile of mil brass sitting there and . . . well, you get the idea.
Lastly, I think I'd like a double-action revolver in 357 Mag. Ruger GP100 would be my first choice right now. I used to have a hankering for a .38 target pistol, but I managed to trade all my 38 SPL brass for 357 Mag, so I'm less inclined anymore.