People quickly grow out of games like Candy Land and Tic-Tac-Toe. They don't have any meaningful decisions to make. Then there are games like Monopoly, that have a few meaningful decisions to make, but those decisions are spread out over a game that will take a long time to end. Even popular gateway games like Settlers of Catan can have very long game lengths (2-3 hours), with most of the important decisions made at the start of the game, and only a few later (who to steal from, or what/who to trade with). On the other hand, Dominion has very short game times, with very compact meaningful decisions.
If you examine the top ranked games, would you find that the majority of them have a high meaningful decisions per hour density?
Does too great a density decrease the fun of a game because of analysis paralysis?