My personal Atari 8-Bit journey from an Atari 800 (48k) in 1983, and XL (64k) in 1984 and a 130XE (128k) in 1985. Starting with nothing but cartridges, moving to a slow tape drive (15 minutes to load up a game?) and then finally to a 5.25" floppy drive. Atari BASIC was the language of choice along with interesting uses of PEEK and POKE and then some solid 6502 Assembly using the MAC/65 cartridge. I still have a few of those cartridges, including Eastern Front 1941 and Galaxian.
I started with my 520ST in 1986, as well as the many classic games, I also did some of my first C programming with Hisoft Lattice C. As well as using the low and medium color resolutions, I loved my high res mono monitor. I upgraded to a Mega 1Mb ST computer in 1989 before starting University and a year later ripped it apart to put into a custom tower with a very loud fan and hard drive!
In a time before graphics were popular (especially given you had low resolution and limited colour choice :-), instead relying on "interative fiction" text adventures, using natural language input (or at least verb-noun) to interact with descriptive environments. My personal favourites are the Hitchhikers Guide to the Galaxy (on which Douglas Adams collaborated) and the Leather Goddess of Phobos.