The Simon the Sorcerer 1 & 2 games would be right up your ally as well.
and Uru also has 3rd person abilities though it is exploration based rather than conversation/inventory. There is no game out now as beautiful & peaceful as Uru and its in 3d!
Riven is the most beautiful, immersive, and realistic of the "slideshow" point & click games. It would be a shame if you missed it. seriously
Myst & Riven games are the best of the first person games. They pretty much defined the genre which is one of the reasons Myst is such a classic. Exile was pretty good too. Also the Journeyman project trilogy & Darkfall (which I was playing right before Path of the Shell) are well worth your time if you like thoughtful games with very good puzzles. I love 'em!