Okay, this is an interesting and challenging thread! I'll give it a try...
Name top 5 most beautiful
Queens
1) Queen Silvia of Sweden
2) Queen Paola of Belgium
3) Queen Rania of Jordan
4) Queen Margrethe of Denmark
5) Queen Fabiola of Belgium
Crown Princesses / Princesses
1) Crown Princess Mary of Denmark
2) Crown Princess Mathilde Of Belgium
3) Crown Princess Victoria of Sweden
4) Crown Princess Maxima of the Netherlands
5) Princess Aimee of the Netherlands
Name top 5 most handsome
Kings
1) King Carl Gustaf of Sweden
2) King Consantine II of Greece
3) King Baudoin of Belgium
4) King Juan Carlos of Spain
5) King Harald of Norway
Crown Princes / Princes
1) Prince Carl Philip of Sweden
2) Prince Maurits of the Netherlands
3) Crown Prince Frederik of Denmark
4) Crown Prince Haakon of Norway
5) Crown Prince Felipe of Spain
Name top 5 that has the most style
Queens
1) Queen Paola of Belgium
2) Queen Noor of Jordan
3) Queen Silvia of Sweden
4) Queen Sofia of Spain
5) Queen Fabiola of Belgium
Crown Princesses / Princesses
1) Princess Grace of Monaco
2) Crown Princess Mathilde of Belgium
3) Princess Diana of Great-Britain
4) Crown Princess Maxima of the Netherlands
5) Crown Princess Mary of Denmark
Kings
1) King Juan Carlos of Spain
2) King Carl Gustaf of Sweden
3) King Constantine II of Greece
4) King Harald of Norway
5) King Baudoin of Belgium
Crown Princes / Princes
1) Crown Prince Haakon of Norway
2) Crown Prince Felipe of Spain
3) Crown Prince Frederik of Denmark
4) Prince Maurits of the Netherlands
5) Crown Prince Filip of Belgium
Name top 5 that has the most elegance
Queens
1) Queen Silvia of Sweden
2) Queen Paola of Belgium
3) Queen Sofia of Spain
4) Queen Elizabeth II of Great Britain
5) Queen Sonja of Norway
Crown Princesses / Princesses
1) Crown princess Mathilde of Belgium
2) Crown princess Mette-Marit of Norway
3) Princess Aimee of the Netherlands
4) Princess Martha-Louise of Norway
5) Princess Marilene of the Netherlands
Kings
1) King Baudoin of Belgium
2) King Carl Gustaf of Sweden
3) King Juan Carlos of Spain
4) King Albert II of Belgium
5) King Constantine II of Greece
Crown Princes / Princes
1) Crown Prince Felipe of Spain
2) Prince Carl Philip of Sweden
3) Crown Prince Haakon of Norway
4) Crown Prince Filip of Belgium
5) Prince Charles of Great Britain
Name top 5 tiaras
1) Ruby tiara of princess Mary (Denmark)
2) Ears of wheat tiara (Netherlands)
3) Baden fringe tiara (Sweden)
4) Laurel Wreath tiara (Belgium)
5) Star tiara (Netherlands)
Name top 5 that has the best education for the job "being a royal"
Queens
1) Queen Beatrix of the Netherlands
2) Queen Margrethe of Denmark
3) Queen Elizabeth II of England
4) Queen Sofia of Spain
5) Queen Paola of Belgium
Crown Princesses / Princesses
1) Crown Princess Victoria of Sweden
2) Crown Princess Mathilde of Belgium
3) Crown Princess Maxima of the Netherlands
4) Crown Princess Mary of Denmark
5) Princess Laurentien of the Netherlands
Kings
1) King Baudoin of Belgium
2) King Harald of Norway
3) King Carl Gustaf of Sweden
4) King Juan Carlos of Spain
5) King Albert II of Belgium
Crown Princes / Princes
1) Crown prince Frederik of Denmark
2) Crown prince Filip of Belgium
3) Crown prince Willem-Alexander of the Netherlands
4) Prince Claus of the Netherlands
5) Crown prince Haakon of Norway
Name top 5 that has the most persons skills
Queens
1) Queen Beatrix of the Netherlands
2) Queen Margrethe of Denmark
3) Queen Silvia of Sweden
4) Queen Fabiola of Belgium
5) Queen Sofia of Spain
Crown Princesses / Princesses
1) Crown Princess Maxima of the Netherlands
2) Crown Princess Mathilde of Belgium
3) Princess Marilene of the Netherlands
4) Crown Princess Victoria of Sweden
5) Princess Diana of Great-Britain
Kings
1) King Albert II of Belgium
2) King Harald of Norway
3) King Carl Gustaf of Sweden
4) King Juan Carlos of Spain
5) King Constantine II of Greece
Crown Princes / Princes
1) Prince Claus of the Netherlands
2) Crown Prince Haakon of Norway
3) Crown Prince Willem Alexander of the Netherlands
4) Crown Prince Filip of Belgium
5) Crown Prince Frederik of Denmark
Name top 5 that is doing the best job representing her/his country
Queens
1) Queen Beatrix of the Netherlands
2) Queen Sofia of Spain
3) Queen Margrethe of Denmark
4) Queen Silvia of Sweden
5) Queen Paola of Belgium
Crown Princesses / Princesses
1) Crown Princess Maxima of the Netherlands
2) Crown Princess Mathilde of Belgium
3) Crown Princess Mette-Marit of Norway
4) Camilla, Duchess of Cornwall
5) Crown Princess Letizia of Spain
Kings
1) King Juan Carlos of Spain
2) King Albert II of Belgium
3) King Harald of Norway
4) King Carl Gustaf of Sweden
5) King Baudoin of Belgium
Crown Princes / Princes
1) Crown Prince Filip of Belgium
2) Crown Prince Willem-Alexander of the Netherlands
3) Prince Charles of Great Britain
4) Crown Prince Haakon of Norway
5) Crown Prince Felipe of Spain
Name top 5 married royal couple
1) Maxima and Willem-Alexander (Netherlands)
2) Filip and Mathilde (Belgium)
3) Haakon and Mette-Marit (Norway)
4) Albert and Paola (Belgium)
5) Beatrix and Claus (Netherlands)
Name top 5 royal families
1) Netherlands
2) Belgium
3) Norway
4) Sweden
5) Denmark
Phew, that was hard...