Played the 1st and loved it.
The second looks exactly like the first apart from a few things. Can't say that I prefer this one since they both look so alike - the story might be better in the first though. Also, it's a shame that you have a limit amout of money in this game.

I didn't finish the 3rd one but, from what I played, it is a fun one (but not as fun as the first two).