Well, it's pretty much impossible not to like the moomintrolls.
The books, the series, the tvshow, the cups... oh my gosh. I would buy anything with moomin on it, which makes me the perfect customer to fool with a whole bunch of crap ;)
Surprisingly, I haven't read all books. I've read the ones about midsummer, winter and the island many times, but then there are a few books that don't speak to me the same way. Strange actually.
Tove Jansson, the author and artist, was a true poet of life. The way she describes environments, characters and feelings is truly unique. I'm so happy she brought this magical world into our world.