Have you ever run across computers that were hardware or software-wise unusual?
I'm quite interested in technology, that's why I've got a whole bunch of not-so ordinary machines standing around at home.
I own quite a few Silicon Graphics workstations (O2, Octane, Fuel), which are great fun to play around with due to the unusual proprietary design (MIPS-CPUs coupled with the company's own high-end graphics and IRIX OS). Also the design rocks!
Other unusual computers of mine include two IBM pSeries running AIX and a Sun Server with Solaris on it.