Here are a few ideas that come in mind :
1. Always trying to fit in: Making decisions based on what other people will think about you. Like not using the tube because ballers do not do that but renting a supercar you can not afford is fine because that is what ballers do right.
2. Having a negative attitude: Feeling sorry for yourself and constantly blaming other people for your problems, specifically the ones you created.
3. Being impulsive: Letting your emotions control your thoughts and behaviour. Never thinking things through or considering alternative options.
4. Acting too confident: Always trying to prove that you know things you don’t know anything about and believing you are better at than everyone else.
5. Not taking time to learn: Never allocating time to reading and a lack of commitment to educating yourself.
6. Being unreliable: Always thinking about yourself. Never being on time or even showing up. Not taking pride in what you do.
7. Keeping the wrong type of friends: Hanging out with negative people that have poor character and lack ambition.
These traits will increase the number of irrational decisions you will make, that will impact your relationships, your career, your finances and much more.