It depends on what I am drinking. On mornings when I struggle awake I tend to drink high caffeine blacks and there I get a pleasant zing.
When I get home from work I tend to have a green or white, and if I have time I will gongfu. This helps me recenter myself and give me a little boost for the remainder of my day.
At night I tend to go herbal or have a rooibos (the latter is more common). I have very warm tasting rooiboses (like caramel and vanilla). And these help me relax and get in that comfy mode.
Now, I have drank so much tea that I have gotten 'tea drunk', where you just start to get silly and bouncy. But, this doesn't happen all that often