I didn't know anybody with an Intellivision when I was a kid. I had an Odyssey 2 (and later an Atari 800 and then an Atari 130 XE). Many kids had a 2600, and I knew at least one with a 5200 and another with a Colecovision.
A little over a decade ago, my wife started talking about the Intellivision she had when she was younger and how great it was. Apparently, her Dad bought it around the end of the system's original lifespan, so he bought a ton of games cheap. I decided to surprise her one Christmas and bought her a boxed Intellivision I and as many games as I could find.
She was thrilled, but the unexpected outcome is I took an immediate and intense liking to the system to the extent it became my favorite console of all time. This also kindled a retro gaming passion in me, as I now also own an Atari 7800, Colecovision, Channel F, Bally Astrocode (my second-most-favorite system), Vectrex, Sega Master System and Sega Genesis.