I got my first computer 20 years ago. It was a Atari 600XL, which i recieved for my birthday. I remember typing listing from magazines on it, but since i've had no tape or disk drive i've let the computer run all night so i wouldn't lose the program :-) After working all summer i had enough money to buy a tape drive.
The computer also had 2 cartridges with games (ala Atari 2600, one was Star Raiders 2), which i couldn't get to work. I've exchanged the first 600XL thinking it was broken. A few months later i discovered by accident that you had to first insert the cartridge before turning on the machine (*duh*) :-)
After 4 years i traded it in for a C64, a decision i still regret to this day. Some years later i bought a 130XE just for the sentimental value :-)
Great times....