My first "gaming" pc was a hand-me-down from a friend, and it ran tf2 at about 30 fps. A few hundred hours in, I found a config that made the game look like it was made in the 90s, but boosted my fps to like 50 fps. I spent hours every day after school on this game, usually just rocket jumping around on Harvest or doing MGE 1v1's with friends.
The game feels too slow to play now, with all the time I've spent playing games like Overwatch and Apex Legends with their faster paces. I'll forever cherish all the memories though.