The "floating" pinball on Bram Stoker's Dracula is still my favorite playfield gimmick.
From a shot sound perspective, I like the "clink" sound the pinball makes when it hits the beer can that the dog Brian is standing on in Family Guy.
Too many Steve Ritchie "tricks" to mention but the kickback targets are fun and challenging at the same time.
The most gratifying shot by far is the hole in one on No Good Gofers.
Of course these are all IMHO....
Bill