I love evenings.
Since deer and hogs like crepuscular light (usually), I feel my chances decrease with increasing daylight, and improve with decreasing daylight. It is a confidence factor for me.
My anticipation level rises as the light decreases and decreases as the light increases.
The darker it gets, my anticaption rises until I can't see to shoot. The lighter it gets, the more "antsy" I get and want to go back to camp and eat breakfast!
And most of my success has come in the fading light of evening.
No science here, just prefer and have had most success just before dark.
John