Looking on the internet deeply has found these results:

I appreciate is the most popular phrase on the web.

I am appreciated 155,000 results on the web	I appreciate 163,700,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I am sorry that Mr Vidal Thank you, Mr Herman, for the valuable report which you have presented to us which I am sure will be appreciated by all your colleagues. I am simply reminding you that people like to know when they're appreciated. I just realize that I work very hard, and I am not appreciated. If I am not appreciated here, I will seek some other place where I will make a difference. Then I moved to where I am appreciated. I am sorry if we haven't made you feel appreciated enough. Until I feel like I am being appreciated, you will not be seeing me again.	I appreciate what you've done for my wife... Still... I appreciate your company. I appreciate you trying to help... I appreciate you letting me crash your hike. But I appreciate your help treating my patients. I appreciate your efforts, Nathaniel. I appreciate the concern, Wizard. I appreciate your respect, son.

I am appreciated

155,000 results on the web

I appreciate

163,700,000 results on the web

More popular!

I am sorry that Mr Vidal
Thank you, Mr Herman, for the valuable report which you have presented to us which I am sure will be appreciated by all your colleagues.
I am simply reminding you that people like to know when they're appreciated.
I just realize that I work very hard, and I am not appreciated.
If I am not appreciated here, I will seek some other place where I will make a difference.
Then I moved to where I am appreciated.
I am sorry if we haven't made you feel appreciated enough.
Until I feel like I am being appreciated, you will not be seeing me again.