A local friend of mine got into pinball about 8 years ago with a Gorgar table, followed quickly by Starship Troopers. He swaps things out pretty regularly, as he can sell stuff for about the same price he bought them for, plus or minus a couple hundred bucks, usually. I'm lucky enough to be able to enjoy the hobby through him.
The line-up as of last night is: Space Station, Johnny Mnemonic, Grand Lizard, No Fear, NBA Fastbreak, Attack from Mars, Iron Maiden, and Total Nuclear Annihilation.
Over the years, I've gotten to enjoy: Starship Troopers, T2, T3, Star Wars (the new one, and I think the Data East one), Lord of the Rings, The Hobbit, Fish Tales, Twilight Zone, Star Trek: Next Generation, Star Trek (2013), AC/DC, Aerosmith, Metallica, Spider-Man, TRON: Legacy, Ghostbusters, The Shadow, X-Men, Game of Thrones, Judge Dredd, Ripley's Believe It or Not!, Black Knight 2000, Junky Yard, Getaway, F-14 Tomcat, Mary Shelley's Frankenstein, World Poker Tour, Star Wars: Episode 1/Attack from Mars (with the swappable playfield), and I may be forgetting a few.
Sometimes he keeps them only for a couple of months. He just sold Twilight Zone, and picked up No Fear and Fastbreak. He's already thinking of putting No Fear back up for sale in a couple months. He's also got Monster Bash arriving soon, and has pre-ordered the Alice Cooper table.
I don't really have a favorite table, but playing Fastbreak last night was very fun. I'm not into basketball, but it's got a lot of interesting shots and cool little mechanisms that I haven't seen a lot. I also really liked the new Star Wars title, and Total Nuclear Annihilation. I'm a big Iron Maiden fan, but that table's a little too difficult for me. I'm sure if I played it more often, it would probably be higher on my list, as my skill would improve.