When I was given my Commodore VIC-20, that really ignited my interest in old computers and, despite still having only one Commodore computer, it's my intention to get more eventually. In additon to Commodore 8-bits, there are a variety of other 8-bit systems that I want to get.
Commodore VIC-20
Year: 1981
CPU: MOS Technology 6502 @ 1MHz
RAM: 5-35kB
Graphics: MOS Technology 6560 "VIC"
OS: CBM BASIC 2.0, KERNAL ROM
Kaypro 4
Year: 1984
CPU: Zilog Z80A @ 4MHz
RAM: 64kB
Graphics: None
OS: CP/M 2.2F
The Commodore VIC-20 was my first 8-bit machine and remains to be one of my favorites. I have a number of accessories for it, including an SD2IEC and a Penultimate Cartridge+. More recently I also acquired a Kaypro 4. I haven't been able to do much with it yet, but first thing I eventually need to do is to repair or replace the floppy drives.