My mom bought an Atari 800 for me for Christmas in either '80 or '81, I think (I'm horrible with dates), mainly because I begged for it. My best friend had received one the year before and I was dying to have one of my own. We were both Atari 2600 junkies so the progression to an Atari computer system was natural.
I'll never forget seeing his 800 for the first time. We were only around ten years old, and I had no idea what a personal computer could or couldn't do. The vision I had was an all-knowing entity such as the bridge computer on Star Trek. I remember asking him, "Can you just type in a question and get an answer?" That was when I learned that the computer actually needed programs before it could do anything.
After showing me a couple of quick BASIC tricks (e.g. 10 PRINT "I'M AWESOME") he popped in a Shamus cartridge and the graphics blew me away.
Growing up with the 800 it always seemed like other computer users looked down on us a bit. I think because Atari was synonymous with gaming people always dismissed the 800 as a video game machine with a keyboard and not a real computer (The Apple ][ machines with their utilitarian green monochrome screens just looked so much more business-like.). I think this perception holds true a bit today, as evidenced by an eBay listing I saw recently for an "Atari 800 game console."
In all fairness to those critics, however, my friends and I did more gaming than anything else on our 800s, but I think that was probably true for most kids my age and computers. Still, from high school through college I wrote all of my term papers in AtariWriter. I couldn't have survived without it. I just wish I'd spent more time learning BASIC and less time playing M.U.L.E., but that was my fault, not the machine's.
I'm ashamed to say that one of the greatest things about being an Atari owner in the early days was the ease with which you could obtain pirated copies of games. Atari users naturally found each other and grouped together back then, and as soon as you met another Atari user the disc trading began. It's embarrassing now to think of the ratio of purchased to pirated games I had back then.
I honestly can't think of anything about the Atari 8-bit computers that I didn't like. I was still using my 130XE in college after most students were working on a Macintosh or an IBM PC. As a matter of fact, I didn't abandon my 130XE until 1992 when I purchased my first IBM PC.