Thayer's Gulls, or Thayer's Gull Like birds

I just want to dump a bunch of photos of birds I think are Thayer's Gulls or could be confused with Thayer's Gulls. This gull. I got no idea!
When I took this photo I thought it was a Thayer's Gull but now I think it is a hybrid of some kind.
Some small percent of Thayer's Gulls have light eyes.
This is a third cycle Thayer's Gull from this winter at Laguna Lake SLO.
Either a Ring-billed or second cycle Thayer's
This is the gull with the P10 mirror below, I thought was some east asian Caspian Gull, but is a Thayer's.
At the time I thought this adult bird was a Thayer's Gull because the bird overall and the bill were very much smaller than the American Herring Gull behind it. Now I think it is a small female American Herring Gull.
At the time I took this picture I thought this was a Thayer's Gull, but now I do not know??
This is a very worn and bleached Thayer's Gull , some summer Glaucous-winged Gull can look like this but this bird's bill was slim and short. And it was very small.
This is a third cycle Ring-billed Gull. Sometimes I try to make them a Thayer's but they are not.
I thought at the time and I think still that this is an Iceland Gull, or Kumlien's Gull. It is not a Glaucous or Glaucous-winged Gull. It is really small.
I used to think this was a Thayer's Gull but the head is squarish and the bill is weird.
I think this bird is a third cycle or fourth cycle Thayer's Gull at Oceano.

This gull I thought was some kind of east asian Caspian Gull, but I now think it is a third cycle Thayer's Gull. Some of them have this mirror on P10.