She is not in the process of becoming good or in the process of getting good, she already is being good. The writer has no doubts she shows a bright side. When does she show a bright side? Anytime when she is being good to everyone. So 'when being good to everyone,' is correct.

What difference is there between them? One is past tense and the other is present tense that is the only difference between them.

I watched the video and the best I can come up with is: Rolled corners of the pages Curled corners of the pages or a watercolour term for wrinkles on paper = Cockles, Cockled paper We have an expression when one deliberately bends the corner of a page = Dog-eared, a lot of 2nd hand books may have dog ears in them from readers folding the corner to mark that page. Usually a well thumbed book can have curled corners but in your case it would be a well elbowed corner but I never heard of people using their elbows until I saw your video. :) Maybe someone wiser may add their wisdom.

What does your father do? My father is a doctor. Do is simple present and is understood as what kind of job he has. What does your father work. Work here is a noun it cannot used as a verb in the context of your original question. You will have to rephrase the question. What work does your father do? My father is a doctor.

They have been married since 1999.

In Australia we say 'have a raffle' "We will have a raffle to raise money for a trip etc"

In this context Klimt was paid to make a work of art for the the Great Hall of the University of Vienna. Because his work received severe criticism he refused to give the paintings to the University and paid them back the money they gave him. This negative experience made him decide to never again accept a public commission for his art.

Yes you are right in both questions