I kind of came at it backwards - I'd listened to 1-2 episodes of RPPR but that was it until the No Soul Left Behind kickstarter dropped. I liked the concept so much (both parents have taught, I do TAing) that I went in for it. It was only later that I listened to the playtest and have been hooked ever since.
With that in mind:
RPG books:
- Most of the stuff from that ArcDream clearout last year. Included Wild Talents, supplements, Candlewick Manor, pretty much everything for MaoCT except Road Trip.
- Eclipse Phase core and Morph Recognition cards
- Esoterrorists 2e
- Laundry Files bundle of holding
- The Quiet Year
- No Security
I was already going to get Delta Green when it launched the kickstarter but RPPR helped convince me to up my pledge.
Other books:
I like the fiction and writing shout-outs a whole lot, so: Wool, Storyteller, and many things (Powers, Planetary, etc) checked out from the library based on RPPRecommendations. Also Darkest Dungeon, though I haven't really played it.