I've been playing through The Witness, and for a game oriented around variations on a single puzzle it's a great game.
Except for one group of puzzles... (possible minor spoiler warning)
There's a group that relies on sounds, and this group of puzzles can just go f*kc itself right off as far as I'm concerned. It starts off fine, until you get to one with overlapping sounds including a "wolf howl" that just makes me want to stab my eardrums out with a knitting needle. And then any failure on the following puzzle forces you to go back and re-solve the previous one, with that f*cking wolf howl playing all over again. And then finishing off that area requires permanently (as far as I can tell) blocking off a really nice shortcut path across the island. Arrrrgggh!
Other than that one group, I've been mostly enjoying it. Some of the rules are really not very clearly revealed, and there have been a couple of times that I've come across where a slightly different ordering of puzzles would have made much more sense, but that doesn't happen too often.