"I love that dry, deadpan style of humor he has."
You like watching a certain late-night TV talk show. You're telling a friend why you like that show. This is how you describe the host.
I love (something)
Depending on where you're from and your culture, "love" might seem like a really strong word. In English, people use "love" to describe how they feel about things that they like such as art, music, products, clothes, and so on: I love your shirt!
I absolutely love my new phone.a dry sense of humor
A person with a "dry" sense of humor often says funny things with a serious, calm expression. They don't smile, laugh, or make silly faces.Some people really like a dry sense of humor; other people don't understand it very well. it can be either positive or negative to say that someone has a "dry" sense of humor.a deadpan style of humor
A "deadpan" style of humor is a way of telling jokes where you don't change your expression. You just make the joke with a straight (serious) face."Deadpan" and "dry" are very similar ways to describe humor. English speakers more often use "dry" to describe the sense of humor of someone that they know, while "deadpan" is specifically for talking about the technique of telling a joke, and use more often to talk about a professional comedian or actor.