Haven't played too many of these yet, but gonna throw out Space Shuttle: trying to get that spinner to 7K (or heck even 5K or 6K) value is tough, but watching the points fly when it happens is oh so gratifying! It doesn't help that you chance a rocketfire direct drain from the pops with every shot through there, so you gotta make them (and your USA lane changes) count. Keeps you on your toes!