Problem: Girls always seem to ignore Robert, and give all the praise to Steven, so

My choice: Steven is likely mature.

Problem: When it comes to travel, Eric likes to ride a bicycle, but William uses a car. This is due to

My choice: William being environmentally ignorant.

Problem: Feeling chronic pain is an everything day for Dennis but not Donald because

My choice: Donald doesn't suffer from chronic pain syndrome.

Problem: The members enjoyed the drinks and threw away the foods, thanks to the

My choice:
foods being garbage quality.