The rules are easy and don’t change much. If you understand the base game the expansion is easy peasy to learn. Everything but the festival cards fit on the board so you need 20 cm^2 more space. The lake tiles I’ll keep for sure, they make the lake actions/Kodamas more interesting. The rocks as well, they are just extra rocks. The double cards are ok. Didn’t see them being overpowered yet. Festival cards I’ll use depending on the crowed. Some don’t like surprises. Maybe only use the blue ones for a nice play and only take the red against your archenemy. Furthermore the festival cards are with text (English and Spanish are sold together). Bitoku I like that much because it is language independent.
Well, this is the big question. I got a folded space so apart from the festival cards everything would fit. But the box design is lovely and I still got some space so it can stay.
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.