Before I tell you the games I regret let me tell you: I recently got into Netrunner. I am 100% overwhelmed (never really played MtG). But I am so grateful for Jinteki. Through some luck I met a very experienced player who takes my hand and shows me all the things one doesn’t know if they have never played living card games/tcg. I also infected some friends of a friend and we only play online due to distance. I am in my 30s and feel so excited for every game. Maybe go on netrunnerdb take a prebuilt get a couple of runs and get excited by playing. My preach is over, now to you question: Most times I was lucky with my blind buys. Oath, CloudAge etc. Games I don’t really like such as Celestia many of my friends enjoy so I keep them. Games I hated first but initially did not buy like Root and Bora Bora I gave a second try years later. Then I started to enjoy them. Maybe because I got more experience and for Root I embraced the chaos. Now I am a proud owner of all but the Clockwork expansions. It sucks spending money on something you looked forward to. The good thing is you can always revisit, resell and regift.