I used to play a tiny RPG for many, many years with a small community of wonderful people that I stayed friends with for years. I started at 11/12 and stopped playing it/other games when I went to college.
Fast forward to my first real career post-school, I have a PC built for me and download Steam. I moved to a new state/city with no friends working 3-11P, so I googled what game has a strong community where you can make friends - and TF2 was one of the top recommendations. Cue my entry to being a Valve A/D backburning pyro main - and I have to say, I legit did make friends very quickly who ended up introducing me to comp TF2:) (also, reading about the b4nny/platinum and m4risa drama got me interested in competitive...amusingly enough)