1. Stack the Deck: it's just too damn hard and not fun to watch, especially given the fact that it gives away "normal" cars. Maybe if it gave away luxury vehicles it might be more enjoyable.
2. Gridlock!: This is easily the worst of the newest games. It's clunky as hell, slow for what it is, and what the heck is the theme? Traffic? Were they really going for a stuck in traffic theme?
3. Gas Money (under its current rules): I would LOVE to see the show bring back the original "Deal or No Deal"-style rules, where you're stuck with your original choice throughout the game.
I don't have a 4 & 5. lol