After a quick Google search, this guy is a Grey Tree Frog.
And I'm very glad to hear that he came back for another visit. Your friend is indeed adorable but you need to tire him out next time around, ie; the yawn.
The first image is my favourite (for the composition contrasting colours, detail, contrast and the super cute factor of those feet and eyes), but not as much as the last set when he was smiling, that one I loved.
Aside...I moved 2nd image around in the lightbox and I think you have a 2nd very interesting image in there, ie; cropped at the edge of the brick.... really hard to spot your friend but when you do spot him
3&4 ... he's watching you so not completely trusting
He/she trusts you and finds solace in your premises; be a protector
Nice images
No yawn, but he is smiling at you in #3... Pretty cute... I wonder if he would let you pick him up, or even give him a little nudge so you could position him in a pose, something like #3 on the leaf in the first image...
Christina, I thought of that but I don't want to scare him to the point he won't come back. I tried to get a different angle of #1 so I could get his face but there was too much foliage blocking him I guess I will just be patient and see what he gives me