I don't have that many slipjoints (comparatively), but I've experienced that feeling of anticipation a surprising number of times.
The first time I experienced it was with this knife, my first CC SFO. I remember being struck by the bone covers. It was one of three instances that I can remember seeing a knife and having to have it.
This was one of the other times I was struck by a case of uncontrollable lust. IIRC it was my second custom. Many knives later I still think it's my best looking slipjoint.
I waited a long time for this knife. All other BFC slipjoints have had multiple blades, but the one I wanted above all others was a single blade knife, simple but exquisitely made. Most did not agree with me as eight forum knives were made before they got to this one, but if the aftermarket demand is any indication, this knife is one of the, if not
THE, most desirable of them all.
I overwhelmingly favor single blade slipjoints in the 3 3/4" range. My primary carry is a #73. A very nice knife; my one nitpick with it is the drop point blade. I much prefer clip blades. I wished for a long time that GEC would make a knife like the Bose BackPocket in the #73 class. A FrontPocket, if you will. GEC fulfilled my wish earlier this year.
And finally, here is a honey of a knife. A nacre covered whittler, this knife is made the way knives should be. It's so pretty, and I so thoroughly enjoy just holding it in my hand and admiring its construction, that this is the first knife I might actually safe queen.