I loved playing games I was familiar with because the rules had been finalised with the people I played with, and we had agreed on the ambiguities (they became house rules). We then developed our strategies based on a known and "complete" understanding of the rules, and the fun came from winning based on the mutually understood set of rules, not a strategem that a player extracted from an unread part of the manual. On the other hand, learning a new game is fun when no-one has played it before, and part of the process was agreeing on the rules after a few run-throughs. Illuminati was great like that. Yet so was the Game of Life card game. A complicated game/rulebook is a different beast. I believe it also needs a person willing to teach the game, or learn it on their own, then teach it. It needs a person familiar with the game, and new players willing to invest in the game knowing they will play it together A LOT. That will exists.