I enjoyed the Enigmatis Series (thus far) a lot. They go: 1. Enigmatis: The Ghosts of Maple Creek 2. Enigmatis: The Mists of Ravenwood (my least favorite) 3. Enigmatis: The Shadow of Karkhala
Typically, I prefer fantasy games (fairy tale types, like Dark Parables, for example), but this (somewhat) realistic series appealed to me for its logical approach (the things you do MAKE SENSE! As do the puzzles, and even the hidden object scenes). And I enjoy the Evidence Board. It's a simple thing, but fun.
Even more important, I like a good story and voice acting, and this series has both. Especially this one. I really appreciate when developers put extra effort into storytelling, voice acting, music, etc... To me, these are the most important factors in whether or not I enjoy a game. I can forgive almost any annoying game element, if the story captures my attention. This one did.