This would be ideal so that you can use their strengths to the team's advantage and anticipate their weaknesses to minimize the impact. Or even better would be to help them develop their weaknesses into strengths!
Mainly though, you want to find at least 1 thing about each of your coworkers that you like about them. This will help you focus on the positive, and also make your coworkers feel good (provided that you praise them). It's important to stay positive.