I usually play blackjack, which is, of course, based on \"Gambit,\" but I do enjoy the TPIR slots. Where Pyramid and Jeopardy really aren't based on luck at all, much of TPIR is, so the feel of it translates better to a slot machine. Plinko is fun, and although Cliff Hangers is one of my favorite pricing games because of the skill factor, the slot version (minus the pricing) is pretty interesting.
At least, as slot machines go.