Good Job, Mate

Good job. That's a nice picture.

You are talented. I like your style. Good job.

You did it all by yourself. Good job! 

Good job putting that away. I'm proud of you.

Wonderful! Fabulous! Creative! Fantastic!

Impressive.

Amazing.

You don it well.

GOOD JOB.

I am running out of new ways to say it. I wonder if he is as tired of hearing it as I am. Probably not.
I never tire of a good little bit of affirmation.