There are multiple types of ADHD, so you two may be discussing different ones. The commonly used categories are

1. primarily hyperactive (cannot stay physically still),

2. primarily inattentive (”daydreamer”),

3. combined type, with features from both 1. and 2.

There's no true ADHD. ADHD has many different manifestations. The one trait I have seen described that seemed most common was "difficulty with impulse control"

According to a medical doctor I have true ADHD. Unfortunately I do not get along with other folks. I have no friends and family that refuses to see me. Work is a struggle to ensure I’m interacting with people in a neurotypical manner that puts folks at ease. That said, I also know people with ADHD who are the life of the party. It really depends on the person.