Re: What are your favourite museums/art galleries?
The Pergamon is absolutely stunning, and after 7 visits to Berlin, it's still the only museum I've been to there. I went to the C/O gallery when they had the Helmut Newton exhibit. It was nice.
My favorite is still the MET here in NYC. I love that I can go for $1 and just spend my day walking around.
Kelvingrove in Glasgow is pretty stellar. The national gallery in Dublin, while super tiny, is a great place to check out if you want to take 45 minutes off the day and just see some great art. I was there like three weeks ago. It's nice.
LOVE the Leopold in Vienna. Egon Schiele is one of my most favorite, favorite artists of all time so I always make a point to go there. (I've only been twice; the first time, I almost cried.)
Kunsthistorisches Museum in Vienna is also magnificent. And it's about to get drop-dead gorgeous in the spring when they open up a new wing dedicated to Hapsburg treasures!!
The Vatican Museum is great; the Van Gogh museum is awesome; I love all three of the big museums in Madrid (though I don't like the city): Thyssens, Prado, Reina Sofia. I also really like Serralves in Porto. The National Gallery in both Oslo and Zurich are great, too. I love going there for the works of Munch and Chagall, respectively.