I remember some of the more amusing growing pains such as Friends not working at all for nearly a year and then being flakey as hell for another. The only things on the service were a few Valve games, some mods and a bunch of patches that didn't integrate well. The forum was constantly down and filled with upset Counter-Strike players. Pretty much every PC gaming related forum was overflowing with people who hated it.
Amazing if you think about what it's become since then.
Playing: Dota 2 Reborn, The Witcher 3, Super Metroid Watching: Galaxy Quest, True Detective S2, Dark Matter