My discovery of an apparently defunct Ancient Age 10yo Special Edition Barrel 107 prompted me to ponder the handful of single examples of hard-to-find bottlings I have. They include the above-mentioned AA and:
<ul type="square">[*]Old Commonwealth 10yo[*]W.L. Weller 19yo[*]A.H. Hirsch 20yo[*]Mellow Mash Private Stock[*]George T. Stagg '02[/list]

While I don't consider any of my bottles "off limits", I also won't open any of the above just to sip in front of the TV or computer. It will only be with someone I know will appreciate their character and rarity (rare, at least, on my shelf). How about you? When and/or for whom do you open hard-to-replace singleton bottles?