Retro computers, mostly x86. On the 8-bit side: I have a working hungarian Videoton TVC (the same type was the family's first computer), 3 Commodore 64s.
The x86 collection starts with two XT clones (one with a NEC V20), an IBM PS/2 Model 30 with a 8086 (this is the only PS/2 with ISA slots instead of the proprietary MCA; later I bought a NEC V30 for this beauty) and ends with a Pentium Pro 200. I also have some x86 machines in between: 286, 386 and 486.
Love these machines, they remind me of the carefree teenage years.
My practice is to only use the OS provided partition encryption (Bitlocker for Windows and LUKS under Linux) methods.