I like 'em all, but here's how I would order them today:
1. Target Alpha
2. Freedom (even without the pop bumper between the flippers!)
3. Big Indian
4. Nip-It
5. Roller Coaster (extremely satisfying to get a good score)
6. Grand Prix
7. Sure Shot
8. Jungle Queen
9. Jet Spin
10. 300
I haven't gone through my first woodrail, Roto Pool, yet, so I don't know where that would fit in.