I'd say any of my whitetail bow kills were major ego boosts, especially my back-to-back kills in '91 and '92. Same tree, same time of day, same everything.

Nailing The Monarch on the Rifle Opener in 2003 was a lifetime achievement at the time:

The Savage Spoke. . .

. . . and then repeating the feat 4 years later and getting the camp record put me over the moon.
The Savage Speaks Again

With turkey, I'd have to say my first non-guided gobbler put me on the top of the world:

Turkey Camp, 2002

I still feel like a putz in camo when I go turkey hunting, but days like that keep me going.

Genesis 9:2-4 Ministries Lighthearted Confessions of a Cervid Serial Killer