First thing I noticed was a whole new appreciation for my wife. This kicked in before I noticed anything else honestly.
I woke up in week 3 and noticed I was getting morning wood again, by week 4 I felt like a teenager again.
Week 5 I started noticing enhanced recovery times from lifting, better sleep, bigger appetite, small increase in HR and body temp.
Now after a few months I can eat normal amounts of food again without gaining BF. Prior to TRT I couldn't look at carbs without gaining weight.