Calling Monopoly fun is a very bold claim, I don't think I've ever seen a game where players are still having fun by the end.

I did a bunch of BoardGameGeek rating analyses recently, one of which was collating a list of "least hated games" [1]. It might be interesting having a look at those sorts of games instead of widely derided games like Monopoly.

World of Warcraft seems like an odd one to analyse in terms of fun too, it's so divisive in the gaming community, you'll find a huge amount of people who find it boring and repetitive.

[1] http://boardgamegeek.com/geeklist/183180/rating-analysis-50-...