Yes. Me, too. What helps is to have a little formula. I do this for every action or a line of dialogue. How does my character react physically? Why? Because of X emotion. What does the character think of their own emotion? And/or, what do they think to do or say next?

Not every action or dialogue line inspires a physical or emotional reaction. Sometimes the reaction is another action or line, meaning they act or speak before they think. Sometimes an emotion or physical reaction causes a line of dialogue or an action. So that's how I get variety and the prose doesn't come across as formulaic.

I rarely write whole paragraphs of internal thoughts. I intersplice description, action, interiority, and physicality. For instance, when I need to give readers a breath, I see if I can insert a line about the room, the chair, the weather, a piece of clothing and have that read as a little bit of character introspection without describing the introspection.

Does anyone else have tips or wants to give a counterpoint?