I read somewhere once where a fan brought a bunch of stuff for Dennis to sign at his solo show-only thing is that it all had to do with Cyclorama!

That would be sort of funny/rare/cool though.
I have been to a lot of Styx signings and see people hand Larry all the early albums to sign.
I agree that sometimes it's more the memories of a moment spent with someone than actually having something physical.
I think unique is all what it means to you. May it be a moment, something rare signed, a special picture. Sometimes more than 'what' you have is that it's all about the moment or 'how' you got it. For instance, I don't purchase things that are auto'd. Not as much fun to me. Doesn't mean as much if I didn't get it.
Ash, I believe too that my moments and talks with Dennis mean more to me than anything physical.
Cool yogi about having something signed too by John C. I believe that to be rare and uqique.
You gotta' love all the old shirts that don't fit anymore. Like those half shirt baseball shirts. The arms are longer than the shirt!
I think all my stuff to do with The Grand Illusion signed by Dennis means the most to me because of the time I spent with him while he was doing it, then what that album means to me. It was also the day I got my first picture with him.
My newest thing that I am digging is Dennis' 'Hello God' single because it really helped me out lately and I don't believe a lot of these are going to surface.