This is a classic that will probably be around forever. It was one of my favorite childhood games.
Looking back at it, as an adult, my love of the game seems a bit ironic, because nowadays I think of monopolies (at least the real-life kind) as bad things. Also, I couldn't really endorse being gleeful about trying to drive someone else out of business. Of course, none of that entered my mind as a kid.
There are many different variations of Monopoly, as well as various fancy deluxe editions. I always played the plain-old standard edition, and that was more than enough.
The main thing that makes this game different from others, I think, is that it can take many hours to play. If other games are like short stories, Monopoly is like an epic novel!
I liked everything about the game, from picking which of the cute silver pieces I wanted to use to represent myself, to the cheerful bright colors of the play money, to the thrill of being the frist to land on Boardwalk and being able to buy it. I like that there is a lot of luck involved, because so much depends on the roll of the dice, but that there is also at the same time a lot of skill, because of the way you can trade your properties with other players.