I must admit my interest for Art is kind of new. I really started going to see exhibitions in 2002. I find any kind of arts and technics interesting: whether I love it or I hate it, I am always happy to have been given the opportunity to see the exhibition.
I love going to Art Galleries & Museums to see exhibitions of any kind: photography, painting, sculpture, etc...
In the last 2 years, I saw several exhibitions: Magritte in Paris, Lichtenstein in London, Lee Bontecou in Chicago, Matisse in New York, Bill Viola in London, etc...

Nicolas de stael in Paris at the George Pompidou Center
Very good exhibition with all the most famous paintings fron de stael such as the football player, he concert, the Ballet.
In June 2004, we visited a gallery exhibiting some pictures from Leni Riefenstahl: we all know about her "Third Reich" photos ordered by Hitler, but she also took amazing pictures of African people in Soudan! 
I went to the Tate Modern to see the Edward Hopper temporary exhibition: in all of his paintings, the lights are fantastic!
Graphic Design Museum in London: An exhibition of Saul Bass was very interesting too.
SAUL BASS (1920-1996) was not only one of the great graphic designers of the mid-20th century but the undisputed master of film title design thanks to his collaborations with Alfred Hitchcock, Otto Preminger and Martin Scorsese.
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When I was in Oslo, on a Business Trip, in January 2005, I managed to find some time to visit the Yoko Ono exhibition at the Astrup Fearnley Museum of Modern Art.
Yoko Ono is one of the most renowned and significant artists living today. With her celebrated instructions, performances, installations, films, music, sculptures and photography she has remained at the vanguard of contemporary art since the 1960s. This exhibition will focus on Yoko Ono's impact on art as a concept and her critical vision. Supplementing the works on display at the museum (sculptures, installations, music), several works will exist only as instructions accessible by mobile phone or the Internet.
Museums in London
http://www.designmuseum.org/
http://www.hayward.org.uk/
http://www.nationalgallery.org.uk
http://www.tate.org.uk/home/default.htm
http://www.npg.org.uk/live/index.asp
Museums in Paris
http://www.cnac-gp.fr/Pompidou/Accueil.nsf/Document/HomePage?OpenDocument&L=2
Museums in Oslo
http://www.af-moma.no/?&language=en
Museums in Helsinki
http://www.kiasma.fi/www/index.php?lang=en