I found a great web site with all kinds of old computers the other day: http://oldcomputers.net/. Here is a list of all the old computers I've owned and still love:
I used to write games in assembler for the Sinclairs. One game for the ZX Spectrum still runs as a Java Applet on my web site (http://www.toedter.com/en/delon/mazeofdelon.html).
I always have nostalgic feelings when I remember all the fun a had with the above old computers. Sigh. Which did you own?