Are there any specific "signs" police officers look for in DUI cases?

I detected the "odor of alcohol" on the defendant's breath or in the car

The defendant's eyes were "glassy," "red," or "bloodshot"

The defendant admitted he had consumed "one or two beers"

The defendant's speech was "slurred"

There were beer cans or plastic cups in the car

The defendant had trouble getting his license and registration to me

The defendant didn't understand my questions

When the defendant exited the car, he staggered or stumbled

When the defendant was standing outside the car, he swayed from side to side

The defendant had to lean on the car to stand

The defendant wanted to argue with me about everything I asked him

The defendant was stumbling as he walked

The defendant seemed disoriented

Whenever I asked him to do something, he couldn't do it the way I explained it