I feel that a good collection of pinball machines should include a Indianna, Addams and a Twilight ofcourse.
Sadly I don't have a good collection by your criteria Caveman. I guess I should probably just get rid of the AFM, BBB, Firepower etc, oh and the BH, HH, Joker Poker.. .. ;) Lots of guys here have **great** collections that don't have any of those three.
Addams - fun game, would own if one came up that was nice and nicely priced (thought about the one Spamways had a little while's back) but not a "must have" - lots of fun though. TZ - well sold mine after six months having bought because so many people couldn't be wrong.. .. to me they were.
Now right on topic - had an Indianna for about a month. Played it heaps - in the first week. Didn't even bother with a farewell game the day I packed it up. Really reminds you of the movies with the theme, music and modes, but the recognisability of that music was also the downfall for mee - it got on my nerves after a while for some reason.
Moral of the story - play 'em and if you love 'em, buy 'em. One man's meat and all that.