Welcome Ingyk to the forum!
Thanks for your comments on Mette-Marit and your insight on drug addiction.
It is not secret that I adore Mette-Marit, too.
What I have always loved about her is her simpleness and her naturalness -- she has never appeared to be a clotheshorse who sought for closets full of gorgeous designer gowns, suits and accessories, which I think suits quite well with the down to earth quality of the Norwegian royals. Her style has never been flashy -- most of her suits are neutral tones, lots of black and grey, light blue, white and soft pink. She does not seem to favour bold, vibrant colours or graphic prints the way her sister-in-law Martha Louise does (which suit Martha Louise's personality much more).
I think she's also quite a natural beauty -- never too much make up (I frequently read that people think she should wear more make up). This naturalness is apparent in pictures from pre-Haakon days, when jeans, a sweater and her hair back in a ponytail with barely a lick of make up would suffice. In the early days of dating Haakon, she frequently went out with him like this, too, despite all the media attention on them as they sipped coffee in the park. I love that she's held steadfast to that about herself.
I think her evolution in terms of her look, her style and confidence is natural. One, as others have mentioned, she now has the financial means to afford nicer clothes -- but also the job requirement for more professional looking clothes. She certainly couldn't go about her royal duties in her jeans and striped sweater! And given more money, even a little bit more, who wouldn't buy a Prada skirt now and then? I certainly don't shop at Banana Republic for my wardrobe because I love their clothes so much! Throw a few extra zeros on my pay cheque and see if I wouldn't add a Prada skirt or Stella McCartney pants to my wardrobe!
Secondly, the last two years certainly has seen her role as Crown Princess take on greater prominence with King Harald being sick (twice now), Martha Louise taking on fewer royal duties, maternity leave, and living in New York, and while Queen Sonja has certainly worked more than her fair share these last two years, there has likely been the same amount of royal duties as in previous years but covered by three royals instead of four or five (plus help from Princess Astrid, of course). I certainly noticed a great self-confidence in Mette-Marit in her solo trip to visit Mawaii.
I've personally never given much thought to her past. I am a big believer in whatever your past mistakes or troubles, they are what have gotten you to where you are today. Without the partying scene (and I have never thought she was an addict -- even a functional addict, merely someone who partied regularly and heartily) and Marius born out of wedlock, Mette-Marit would never have met Haakon and we wouldn't have such a couple in love today or Ingrid Alexandra or this baby to come. And how many of us can say that we're completely innocent or absolved of any mistakes in our lives? I certainly can't. I certainly can't stay that I've never hurt anyone, made mistakes in my life or even inhaled at a party or two!
In the end, I think that Mette-Marit is a wonderful example of how people can overcome difficulties in their life. Just because you've smoked pot or done drugs or drank, or had pre-marital sex does not make you a bad person. And even if one is an addict, we shouldn't write such individuals off -- we should offer them the means and the support to clean themselves up and right their life so that they can contribute back to society.
In a long winded manner, the qualities I love most about Mette-Marit are that she has changed her life around so much in such a short time, and that she's approached her role as Crown Princess with naturalness, humbleness and ease, without airs but simplicity and an earthliness that I think represents Norwegians well. She didn't change herself to be Crown Princess or sell herself out and force herself to be someone she wasn't. She took on the role on her own terms and has made it as unique as Sonja made the role when she became Crown Princess.
I'd be proud to have someone such as Mette-Marit representing me!