Let's see some other people's shelves in here!
The bag on the left is my original B/X books, B2, and T1. The only one of the 1e books that is my 1st copy is the DMG. The bag on top is the Tome of Mighty Magic from 1982. The two before Volo's Guide are Seas of Blood and Jade Dragons & Hungry Ghosts. The book on its side is Traveller. The one at the end is Mummy, 2nd ed.
I have a box in the basement full of old character sheets and campaign materials, Gamma World 1e, Star Frontiers, and a bunch of old Star Fleet Battles things from the 80s. I have 13th Age & Trueways, Rogue Trader, Fate, a dozen+ of PF things, and a few others by e-copy. Tons of other stuff was sold off over the years (wish I had kept the MM and MM2 from 1e just to have; don't miss the 3.5 and 4 stuff).
Only the 5e is getting current use (except as reference when looking things up for threads here). My 11yo has five more 5e books (although not an MM or DMG yet, so he borrows mine usually). I think flipping through the Bestiaries when he was small is a part of what hooked him on wanting to play. If this was a TPB/HC comic reprints and graphic novels I'd have a bit more to show