I love Atari because it's been here for over 30 years.
The 2600 was my first system and I haven't got any other brand since then
All my systems are Atari: 2600,7800, Lynx and Jaguar (I didn't ant to get the 5200 because for the low support but would to get one just for collectors item, as for the XG that was more computer then game system)
my favorite games are: star raiders,raiders of the lost ark,swordquest series games (thats 2600) for jaguar there is protector and battlesphere. theres basiclly too many games for me list that Ilike.
all my systems I got when they first came out.
I also started a user group dedicated to Atari systems.