I had a warmouth years ago and blue-gills in the same tank from a rescue. The warmouth was my favorite, It had red eyes and it would be the last to come to the glass when it saw me.
I love the way it moved, like it was studying me as it approached. It cruised moderately fast and it seemed like it barely moved it fins.
The blue gills would move all over the place jumping over each other. The warmouth would stay in one place at the glass.
The warmouth would strike very fast at food. I loved to see if open it's large mouth. It would take food to the back but always keep an eye on me.
Even when the warmouth was full it would still come back and interact with me.The blue gills would move back when they were full. The warmouth would always stay and look at me the entire time I was in the room.
Even though the warmouth is drab in color, hands down it was my favorite so far. I can't catch any, they are not that common in our areas. I found a guy that is selling me a few. They don't don't have the red eye and I will try them anyway.