I used to be down bad, when it came to this shit. The kick was introduced to me, when I bought the 360, back in 2005 (damn I'm old). I booted up the game Hexen (which came pre-installed on the OS) and was greeted by that magical sound of 20 gamer points being added to my total score. Soon I found myself rummaging through the bargain bin in Gamestop looking for the next source of GP. The TMNT game for 360 was infamous for only having 5 achievements, each yielding 200 GP. Much crap was played in this phase of my life (Vampire Rain, Hour of Victory, the Prison Break game (lol)). It wasn't all bad though. The great hunt introduced me to games like Viva Pinata which I still cherish to this day.
During highschool many pointed out the negative correlation between a high gamer score and being a pussy getting gigachad but in my group of speds, gamescore was a status symbol. Good times.