Hey Jakob_Knight,
I find it interesting that you separate "good player" and "good teammate", why can't these be mutual? I consider myself a good player as well as a good teammate and try to do what is best for the team in most cases. Sometimes this is tough to do because the battle develops in a certain way, but for the most part doing what is best for the team is also best for you. This all boils down to what you have set as a goal personally, correct? I like to win so I want to do what is best for the team and I want my contribution to help the team win.
Signs of a good player (experienced player) IMO:
Target Prioritization: What they shoot and when they shoot it is a good sign for you to tell if a player understands their role.
If in a DD, they pay attention to the other team's lineup and they identify where the radar is before moving onto a cap. If they do move onto a cap the DD doesn't sit broadside and alway...