Tip Calculator App

What are you most proud of, and what would you do differently next time?

I don't want to look back at this project ever again, however I did learn a long list of things I didn't knew before. I never had written this much unorganized code in my life

What challenges did you encounter, and how did you overcome them?

I have live preview error once again, I don't care anymore ... the biggest encounter was with directives, directives are both the best and the worst thing ever, I don't get why can't I add directives to dynamically created objects??

What specific areas of your project would you like help with?

any review/advice is great :). This project was a roller-coaster and I would understand if you are not able to wrap your head around the horrible code I've written.