What’s the impact of a competitive mindset on your personality during exam prep, and how can you stay true to yourself?

What is considered attractive to any audience when it comes to guys? I am in my mid 20s and looking to get back into dating, and wondering if any of my qualities are considered attractive or if I should pick up something new.
How does Iran's missile development program play into fears about their potential nuclear capabilities?
Why do people assume that someone who leaves a marriage for a new relationship will repeat the pattern? Is there any truth to that?