The size of my Steam library is ... a little scary these days. It's kind of daunting whenever the question of "what would I like to play" comes into my head, because there are so many choices. Like, way too many choices.
According to my Steam profile, I have around 390 games in my personal library, which isn't too bad. I've purchased the vast majority of those; I still buy more games in a year than I get for free, mostly because it's more convenient and I like the idea of appreciating developers where I can. That's especially true for a lot of retro games that I played as a kid that weren't stocked in local game stores, as anyone who spent a lot of time around abandonware will remember.
In the early days of Steam sales, it was really easy to build up your library too. Flash sales for big collections like Quake, retro bundles for Sierra games, Star Wars packages and so on. And as the years passed, you had things like Humble Bundle, Bundle Stars, and other charity offerings get into the mix.
So it's not that uncommon to have hundreds and hundreds of games in your Steam library. But I'm curious. How many games do you have in your bank - and how many of those have you actually played?