Ответ:

Task 2.

1. calm

2. loyal

3. reserved

4. experienced

5. bad-tempered

6. eccentric

7. easy-going

8. stubborn

9. posessive

Task 3.

1 group: stubborn, arrogant, cheerful, easy-going, loyal, practical, open-minded.

2 group: eccentric, adventurous, bad-tempered, impulsive, original.

3 group: impolite,  immature, insincere.