Wow, that is a loaded question. I have several, most I have written about in one media or another, so I'll "long story short" it:
1--The ultimate dream hunt- My Dad cancelled his Caribou hunt in Alaska in 1965 when he found out I was on the way. I'd like to not only give him HIS dream hunt, but join him on it.
2--Red Stag--It was the hunt of royalty in the old world.
3--The moose I could not release on in Maine with my Browning Nomad in 1982. (That was 8 yards away from me)
4--NOT pulling the trigger on a Buffalo in a brass tube scope atop an old black powder Sharps.
Sorry for ramblin, but one can dream.....and you started it.