Number of Plays - When is it enough?

This is related to my other post on buying habits, where I shared that because I recently bought a bulk of games, I'm trying to hold off on buying more until I've given each new game at least 5 or more plays.

My line of reasoning behind that number is to simply think about cost per play. For example, I bought #Clans of Caledonia for $40 and have played it twice so far. That puts the cost at $20 per play. Personally, I like to have played a game a number of times myself until it at least reaches the cost of a movie ticket (so if I were to play Clans 5 times, that would be $8 per play--in comparison to what... $12 movie tickets these days?). This doesn't mean that I'll just stop playing the game, but it helps me know that my collection is getting enough love where I'm not continuously leaving behind a trace of games played 1-2 times. And this isn't just helpful from a cost standpoint, but encourages me to properly explore a game's full potential.

I'm sure you may have noticed but this thought process removes several factors like number of players and the amount of play time. For example, a $100+ purchase of TI4 with a single play may be well worth the cost to some people if it means 4h+ of fantastic game time with 4 friends ($6.25 per hour per person per play to be exact). Did your friends contribute toward the purchase? No, but if you're the type of person who just really enjoys seeing others have fun, then even a single session may be enough to say it was worth it. Personally, I just like to keep it simple because it's closely tied to managing my own budget and because most of the games I buy will be mostly played with my wife.

Finally, here's my question--at what point do you feel that a game has gotten enough plays that you don't have to feel bad about moving on for a while?