I collect musical instruments, mainly keyboard based instruments. My wife and I are both classically trained pianists and organists. I've done keyboard instrument repair for well over a decade which has definitely led to the collection growing. We have an interesting collection of classical instruments (some historic) and then a synthesizer/rock room. I think every room in the house has at least one musical instrument.
Here are 2 of the instruments that get the most attention when we have people over. A 10 rank organ made by Rushworth and Dreaper in Liverpool, England in 1914.
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A double manual French harpsichord made by Hubbard sometime in the 1970s.
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I also collect laserdiscs. I grew up with the format and watching the complete Looney Tunes, Tom and Jerry, and Tex Avery cartoons on laserdisc. I started my own collection several years ago and I've got at least 1,500 titles. The most recent photo of my collection is from 2 years ago. I've probably added about 100 titles since I took this photo.
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Quoted from ZAuxier:LASERDISCS!!!
Whoo Hoo! It's always great to meet another laserdisc collector!
Then there's the LP collection. I think I've got around 5-600 LPs. I don't actively collect those anymore though like I used to.